Update 4/14/2024: I charged it up full and took it to one of my wife's marathons this weekend. Starting voltage was 54.4v (99% theoretical max 54.6v capacity) and drove ~14.3 miles throughout the day with rolling hills in Kentucky. End voltage was 48.4v. So 6v used for 14.3m. Temps were mid 40's to mid 60's throughout the day. Top speed was still around 29-30mph. The battery cutoff is 39v. On a discharge curve, you'd see that the initial 54.6v (100%) to 50v (70%) would drop relatively quickly, with then steady discharge from 50v (70%) down to 42v (20%)... which is the ideal stopping point. After 42v (20%) the drop to 39v (0%) would also be rapid. Doing the math, I used about 39% to travel 14.3 miles which means in theory I'd have about 36.67 miles of range. Still super happy with the upgrade!
Hi Brent I upgraded my battery but I put a 52volt battery now it flies think it goes 40mph and so far everything looks good I mean no cables burning or anything.
Interesting. Yeah I just did some google-fu on the use of 52v batteries on 48v controllers and found: "Most 48v and 52v controllers have electronic components that max out between 60v and 64v. Higher voltages will burn them out. That is why it is safe for 48v controllers to tolerate voltages up to 60v. 52v batteries have a maximum voltage with a full charge of 58.8v, so this is a safe voltage for the components in a 48v controller. Motors are even more tolerant. They just spin faster, given higher voltages." But they do go on to say 60v batteries are too much as they max around 67.2v and would burn out the 48v controller. So 52v are the "sweet spot" for performance on 48v controllers assuming they can handle the load. The controller in this scooter is the OKW16P-4 which doesn't seem to have much documentation out there to say what it's tolerances are... but you took the chance and it may have paid off. Enjoy the boost!
Update... took the scooter out for the past couple days and did some math on the battery performance. First off, the top speed went from 23mph on the old battery to 30mph on the new. WOW! I was NOT expecting that. Second, I rode 4.3 miles and used just under 15% of the usable battery life (54.6v dropped to 52.1v... cut off voltage is 39v). Extrapolating this out with today's 35 degree average weather, I could have gone ~28.7 miles. That is a CRAZY improvement over the old battery's 8 miles in the same conditions I tested last year. And I'd expect slightly longer range in warmer temperatures, so 30 miles shouldn't be out of the question in summer months.
I've only seen complaints about BTR's LiFePO4 batteries being built with a Li-ion board... causing issues. I've not seen any fire issues with these to a degree above any Li-ion brand. This one has been solid. I even wrecked in July and the battery came out but remained unscathed. I packed it back in it's foam borders I put in the deck and it's been great still. No issues.
@BrentTech Good morning, I want to ask what the dimensions of your battery are. Is it 6.3 x 6.3 x 10.26 and does that fit inside the bay of your Uber scoot easily?
Dimension: 255x165x110mm... so roughly 10 x 6.5 x 4.33 inches. You can see in the video it fits easily but with padding that I added, it's fairly snug. You could do something different with padding if you prefer. I'm not sure if you can fit a 6.3" tall battery without measuring... you should check that.... but the other dimensions you list are fine.
No issues yet! I've taken it out a few times for a few miles and charged it fully. No problems. I haven't done a "long run" full battery drain yet, but will give it a run eventually. I'll post back when I do.
I swapped out the motor it was a DC 1000w motor and not brushless. Added a 3000w BLC motor and can peak 5000w it lifts the front tire off the ground. And will be running off a 72v battery on this Uber scooter. Hopefully to go over 23mph on it with our whiles lol.
Love it! Yeah I found the front wheel kicking up on me with the battery mod too, so I can imagine what you have with 3x the motor and going 48v to 72v!
As far as I know the brakes are not electronic on this model. They are standard bicycle cable brakes. So if you are squeezing the brake and the scooter is speeding up, I would guess you are accidentally moving the throttle on the grip by the brake handle, or you have some version of a scooter with an actual speed control that tries to maintain a certain speed (like cruise control) and it senses the brake resistance and adds more power. It short, it shouldn't be related to this mod at all... 48v is 48v whether it comes from SLA or Lithium Ion.
Definitely potential to go bigger, but at some point you have to balance performance vs cost. The 35Ah is over 500 dollars already on a scooter that now sells for around 800 or so. How far do you need to go between charges? To each their own.
I'm doing the same thing with mine I want to get a good battery I see a few different people getting 48v 20ah batteries and 48v 25ah what is the best in you opinion
The only difference there is range. 12ah is the original... so 20ah is less than double that. 25ah is just over double. So how much do you want to spend and how much range do you need? Either one will be a major upgrade over the original.
Hello Brent, thank you for a very informative video. I have the exact same scooter that I bought 5 years ago. I had to replace the 4 SLA batteries once, but I would like to convert it to lithium battery. Questions: 1) Your battery appears to be the top of the line and quite expensive ($559 on Amazon?). Is there cheaper alternative? 2) You didn't have the 2 fuses connected to the controller. Did this set up give you any problem? Thanks again.
1) You can save $ by going with a lower Ah rating. I went with a 35Ah vs the original 12Ah (so about 3x the runtime). If you are happy with the distance your SLA give you, just go with a 12Ah Lithium... or something close to it. The problem is your BMS (Battery Management System) needs to be capable of discharging the Amps you'll pull on this 1600W scooter. So some quick napkin math tells me the 1600W/48v= about 30Amps... So the battery I have included a 50Amp BMS. I'd say you could TRY a 40Amp BMS battery... but I wouldn't go lower. BTRpower has a 20Ah battery with a 40Amp BMS for about $300. Google their name for their website pricing if it's cheaper than Amazon (I don't know honestly). 2) I have not had a problem with the fuses disconnected. It was 40A worth of fusing... I'm running a 50A BMS and the motor/controller is only pulling 30A under normal operation, so I have plenty of room to not worry about it. I would GUESS you'd be fine with a 40A BMS as well. To be clear, I am NOT an electrical engineer here... but my understanding is that the fuse only protects the battery and/or controller as it is inline between the two, from a short in the wire damaging one or the other. The controller is replaceable for about $30 in this scooter. The battery is what I'd be worried about damaging. This particular battery BMS says it has "over discharge protection, over current protection, and short circuit protection" built in. I'm not 100% that means it covers this wire vs the internal connections between batteries... but I think it does, making the fuse redundant. In a SLA battery chain like designed, there is no BMS involved. The fuse is important there. Here, I think it isn't needed. Someone feel free to chime in if I'm off base here... I've driven it a couple of times for about 12 miles at full speed and haven't had any issues. And to be clear, I had plenty of range left. I just was done getting where I needed to be! I hope your upgrade goes well!
I just did the replacement the day I posted this and we've had a rainy week, so I haven't had time to take it out much... but I'm not anticipating any issues. I'll post back in a couple months.
I picked mine up on ebay. BTRPower dot com is their site, but they sell direct on eBay too with better prices. Check the video description for battery specifics.
Hi my name is max I have the same 1600w I'm trying to get the controller box Metro tech used to have a but now they don't so they told me that the old company stop making them and now there's a new company but I can't wait that long is from Evo metrotech if you happen to know a company please send me the link thank you
www.btrpower.com/collections/48v-ebike-battery has some options. I picked up the www.btrpower.com/products/ebike-battery-48v-35ah-lithium-ion-battery-pack-with-5a-charger-50a-bms-fit-for-1000w-1500w-2000w-motor but just make sure the size you pick will physically fit into your scooter... For this particular scooter, you need to match the 48v and the 50A BMS... which these do... but the Ah rating (how long it will run) is up to you for how much you want to spend and if the battery will fit in your scooter. 35Ah is probably the largest I could fit in there. The original SLA batteries were 12Ah rated, so this should get me about 3X the run-time. I know BTR Power also sells on eBay...
@@BrentTech Thank you for the information. I have a Scooter 4e 7 1000W. In 4 days, the battery did. I was looking to buy an excellent quality battery for it, but with the old battery 10KM, it shut down. Thanks for the w Zadar websites.
Hello, what’s the mileage range with the new battery mod. Other videos said that the scooter averaged 10 miles with the lead acid batteries. Have you had a chance to test the new full range yet?
I haven't had a chance to deplete it yet and probably won't until I decide to install an accurate voltage meter to know the range so I'm not stranded somewhere. The old SLA batteries were rated at 12AH and the new one is 35AH, so you'd have roughly 3x the range. Depending on drive speed, weather, rider weight, terrain, etc... your mileage will vary. I know on the SLA I made it about 8 miles in about 30F temps. I'd see 10-12 max in better conditions. I'm expecting to see about 24-30 miles on this battery.
Update 4/14/2024: I charged it up full and took it to one of my wife's marathons this weekend. Starting voltage was 54.4v (99% theoretical max 54.6v capacity) and drove ~14.3 miles throughout the day with rolling hills in Kentucky. End voltage was 48.4v. So 6v used for 14.3m. Temps were mid 40's to mid 60's throughout the day. Top speed was still around 29-30mph.
The battery cutoff is 39v. On a discharge curve, you'd see that the initial 54.6v (100%) to 50v (70%) would drop relatively quickly, with then steady discharge from 50v (70%) down to 42v (20%)... which is the ideal stopping point. After 42v (20%) the drop to 39v (0%) would also be rapid.
Doing the math, I used about 39% to travel 14.3 miles which means in theory I'd have about 36.67 miles of range. Still super happy with the upgrade!
Sad to see in 2023 as of August this battery is almost 500 bucks, great job thx for sharing
Hi Brent I upgraded my battery but I put a 52volt battery now it flies think it goes 40mph and so far everything looks good I mean no cables burning or anything.
Interesting. Yeah I just did some google-fu on the use of 52v batteries on 48v controllers and found: "Most 48v and 52v controllers have electronic components that max out between 60v and 64v. Higher voltages will burn them out. That is why it is safe for 48v controllers to tolerate voltages up to 60v. 52v batteries have a maximum voltage with a full charge of 58.8v, so this is a safe voltage for the components in a 48v controller. Motors are even more tolerant. They just spin faster, given higher voltages."
But they do go on to say 60v batteries are too much as they max around 67.2v and would burn out the 48v controller. So 52v are the "sweet spot" for performance on 48v controllers assuming they can handle the load. The controller in this scooter is the OKW16P-4 which doesn't seem to have much documentation out there to say what it's tolerances are... but you took the chance and it may have paid off. Enjoy the boost!
I found the same information on upgrading to a 52 volt battery… This is the way I am going to go.
Update... took the scooter out for the past couple days and did some math on the battery performance. First off, the top speed went from 23mph on the old battery to 30mph on the new. WOW! I was NOT expecting that. Second, I rode 4.3 miles and used just under 15% of the usable battery life (54.6v dropped to 52.1v... cut off voltage is 39v). Extrapolating this out with today's 35 degree average weather, I could have gone ~28.7 miles. That is a CRAZY improvement over the old battery's 8 miles in the same conditions I tested last year. And I'd expect slightly longer range in warmer temperatures, so 30 miles shouldn't be out of the question in summer months.
Video update will be awesome.
Battery name?
@@IsakAndersen BtrPower says it on his battery 0:56
where did u get the battery pack?? can u post a link thanx
Hi Brent also did the front fork reversal now is more stable plus added motorcycle pegs in front fork now can stretch my legs like in my harley lol😅
Thank youk, that was fun to watch.
you sir are a genius
Btrs have been known for fires. How’s the battery setting up so far?
I've only seen complaints about BTR's LiFePO4 batteries being built with a Li-ion board... causing issues. I've not seen any fire issues with these to a degree above any Li-ion brand. This one has been solid. I even wrecked in July and the battery came out but remained unscathed. I packed it back in it's foam borders I put in the deck and it's been great still. No issues.
@ great to hear. I’ve had one also and was actually pretty stable even with a little beating but always got slack for it in the groups
@BrentTech Good morning, I want to ask what the dimensions of your battery are. Is it 6.3 x 6.3 x 10.26 and does that fit inside the bay of your Uber scoot easily?
Dimension: 255x165x110mm... so roughly 10 x 6.5 x 4.33 inches. You can see in the video it fits easily but with padding that I added, it's fairly snug. You could do something different with padding if you prefer. I'm not sure if you can fit a 6.3" tall battery without measuring... you should check that.... but the other dimensions you list are fine.
Where can I buy this setup do you have a link
thinking of doing the same thing have you ran into any issues as of yet?
No issues yet! I've taken it out a few times for a few miles and charged it fully. No problems. I haven't done a "long run" full battery drain yet, but will give it a run eventually. I'll post back when I do.
Anything yet?
Would love to see the results of the long run
I swapped out the motor it was a DC 1000w motor and not brushless. Added a 3000w BLC motor and can peak 5000w it lifts the front tire off the ground. And will be running off a 72v battery on this Uber scooter. Hopefully to go over 23mph on it with our whiles lol.
Love it! Yeah I found the front wheel kicking up on me with the battery mod too, so I can imagine what you have with 3x the motor and going 48v to 72v!
@@BrentTech I weigh 280 lbs and it lifts the front wheel off the ground. It's nuts.
I have placed a 48v battery and now I have the problem that when I press the brake it accelerates any idea what it could be
As far as I know the brakes are not electronic on this model. They are standard bicycle cable brakes. So if you are squeezing the brake and the scooter is speeding up, I would guess you are accidentally moving the throttle on the grip by the brake handle, or you have some version of a scooter with an actual speed control that tries to maintain a certain speed (like cruise control) and it senses the brake resistance and adds more power. It short, it shouldn't be related to this mod at all... 48v is 48v whether it comes from SLA or Lithium Ion.
You could fit a 50 or 60 amp hour battery if you wanted to.
Definitely potential to go bigger, but at some point you have to balance performance vs cost. The 35Ah is over 500 dollars already on a scooter that now sells for around 800 or so. How far do you need to go between charges? To each their own.
I'm doing the same thing with mine I want to get a good battery I see a few different people getting 48v 20ah batteries and 48v 25ah what is the best in you opinion
The only difference there is range. 12ah is the original... so 20ah is less than double that. 25ah is just over double. So how much do you want to spend and how much range do you need? Either one will be a major upgrade over the original.
@@BrentTech I'm going to order a 48v 25ah If that's the best I can find
Where did you order your 35Ah battery I can only find 26Ah on aliexpress?
Google the brand... they have a website and sell there and on ebay I think. BtrPower. Click "E-bike lithium battery" in the menu, 48v...
@@BrentTech thanks man
Hello Brent, thank you for a very informative video. I have the exact same scooter that I bought 5 years ago. I had to replace the 4 SLA batteries once, but I would like to convert it to lithium battery. Questions: 1) Your battery appears to be the top of the line and quite expensive ($559 on Amazon?). Is there cheaper alternative? 2) You didn't have the 2 fuses connected to the controller. Did this set up give you any problem? Thanks again.
1) You can save $ by going with a lower Ah rating. I went with a 35Ah vs the original 12Ah (so about 3x the runtime). If you are happy with the distance your SLA give you, just go with a 12Ah Lithium... or something close to it. The problem is your BMS (Battery Management System) needs to be capable of discharging the Amps you'll pull on this 1600W scooter. So some quick napkin math tells me the 1600W/48v= about 30Amps... So the battery I have included a 50Amp BMS. I'd say you could TRY a 40Amp BMS battery... but I wouldn't go lower. BTRpower has a 20Ah battery with a 40Amp BMS for about $300. Google their name for their website pricing if it's cheaper than Amazon (I don't know honestly).
2) I have not had a problem with the fuses disconnected. It was 40A worth of fusing... I'm running a 50A BMS and the motor/controller is only pulling 30A under normal operation, so I have plenty of room to not worry about it. I would GUESS you'd be fine with a 40A BMS as well. To be clear, I am NOT an electrical engineer here... but my understanding is that the fuse only protects the battery and/or controller as it is inline between the two, from a short in the wire damaging one or the other. The controller is replaceable for about $30 in this scooter. The battery is what I'd be worried about damaging. This particular battery BMS says it has "over discharge protection, over current protection, and short circuit protection" built in. I'm not 100% that means it covers this wire vs the internal connections between batteries... but I think it does, making the fuse redundant. In a SLA battery chain like designed, there is no BMS involved. The fuse is important there. Here, I think it isn't needed. Someone feel free to chime in if I'm off base here...
I've driven it a couple of times for about 12 miles at full speed and haven't had any issues. And to be clear, I had plenty of range left. I just was done getting where I needed to be! I hope your upgrade goes well!
I’m trying to do the same thing to mine I’m just wondering how is it still hanging in
I just did the replacement the day I posted this and we've had a rainy week, so I haven't had time to take it out much... but I'm not anticipating any issues. I'll post back in a couple months.
Hi I would like to know where did you get your battery
I picked mine up on ebay. BTRPower dot com is their site, but they sell direct on eBay too with better prices. Check the video description for battery specifics.
Did u upgrade ur sprocket too?
I did not. I think there is a video on UA-cam showing that though...
Good
Where did you buy the battery pack?
ebay... but just search btrpower and you can find their website.
Hi my name is max I have the same 1600w I'm trying to get the controller box Metro tech used to have a but now they don't so they told me that the old company stop making them and now there's a new company but I can't wait that long is from Evo metrotech if you happen to know a company please send me the link thank you
Is your old controller dead?
Hello, where are you buying that battery?
www.btrpower.com/collections/48v-ebike-battery has some options. I picked up the www.btrpower.com/products/ebike-battery-48v-35ah-lithium-ion-battery-pack-with-5a-charger-50a-bms-fit-for-1000w-1500w-2000w-motor but just make sure the size you pick will physically fit into your scooter... For this particular scooter, you need to match the 48v and the 50A BMS... which these do... but the Ah rating (how long it will run) is up to you for how much you want to spend and if the battery will fit in your scooter. 35Ah is probably the largest I could fit in there. The original SLA batteries were 12Ah rated, so this should get me about 3X the run-time. I know BTR Power also sells on eBay...
@@BrentTech Thank you for the information.
I have a Scooter 4e 7 1000W.
In 4 days, the battery did. I was looking to buy an excellent quality battery for it, but with the old battery 10KM, it shut down. Thanks for the w Zadar websites.
I can’t find this battery anywhere! It’s been out of stock for 6 months! Any suggestions?
Melted the 3 wires th a t go to the motor yet?
Nothing has melted.
Hello, what’s the mileage range with the new battery mod. Other videos said that the scooter averaged 10 miles with the lead acid batteries. Have you had a chance to test the new full range yet?
I haven't had a chance to deplete it yet and probably won't until I decide to install an accurate voltage meter to know the range so I'm not stranded somewhere. The old SLA batteries were rated at 12AH and the new one is 35AH, so you'd have roughly 3x the range. Depending on drive speed, weather, rider weight, terrain, etc... your mileage will vary. I know on the SLA I made it about 8 miles in about 30F temps. I'd see 10-12 max in better conditions. I'm expecting to see about 24-30 miles on this battery.
Please use real solder.
These chinese connectors are not great for high amperage applications.