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Ebike battery

Pm1982

Jun 8, 2023
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I recently purchased an ebike with a 1000w 48v 15ah Samsung lithium ion battery, I want to buy a battery backup with an ac outlet to recharge the bike when I'm not at home, but I'm having trouble figuring out what battery to get that will charge the bike battery 100%
 

Martaine2005

May 12, 2015
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I think you would need a car battery and an inverter. Hardly portable and totally impractical (IMHO). Then you would have to charge the car battery!.

Martin
 

kellys_eye

Jun 25, 2010
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Amazon is replete with bog standard 48V LiOn chargers so take your pick. Powering the charger via an inverter doesn't seem a very reliable or efficient process so look to a Boost converter/charger with a 48V output that accepts a 12V DC input. They do exist and, surprisingly, are cheaper than the AC mains chargers.
 

Pm1982

Jun 8, 2023
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I was thinking something like this I could put on the back rack on the bike and then plug the bike charger into this, I know it is strong enough I just don't know if it hold enough to fill up the bike battery
 

Delta Prime

Jul 29, 2020
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battery back up. I have a 500-W motor
And when I've learned cuz I built my own battery pack they would come in the form of a series parallel connection the 13 lithium ion batteries in series and 4 in parallel
So it would be S13 P4
And note The lithium ion batteries fully charged is 4.2 volts and nominal voltage is 3.7 volts therefore
3.7 * 13 =48.1Volts they just use 48 volts . Now. 4.2 volt * 13 =54.6Volts
They just use 54Volts sometimes 52 volts. And that is for advertising so if you see a 48 volt battery is the same as a 54-volt battery. They're no standards in the industry yet. For advertisement. Also have what is called battery blenders they go by other names as well and what they do is they allow you to put two batteries in parallel with different voltages or the same voltages. more power more current more torque for going up hills.
Booyah!!


Screenshot_20230608_111229.jpg
 

kellys_eye

Jun 25, 2010
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I was thinking something like this I could put on the back rack on the bike and then plug the bike charger into this, I know it is strong enough I just don't know if it hold enough to fill up the bike battery
Your bike battery is stated as being 1000W and your chosen charger/pack is rated at ~100W therefore it would only recharge your bike by 10%. At that price you'd be better off purchasing a second bike battery and swapping the battery out when it's discharged.
 

Harald Kapp

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Nov 17, 2011
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I second that: simply take a spare bike battery with you. No need to recharge while on tour.
 

Delta Prime

Jul 29, 2020
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I think you bought the wrong e-bike for your particular application since you recently bought it maybe you can return it because some electric bike models use regenerative braking to charge your bike while you ride it. The energy produced by your pedaling is usually lost when you brake, but it is saved and reused if you have regenerative braking. Only a small percentage (5-10%) of the energy lost by braking can be recovered to recharge the battery ;)
 

Delta Prime

Jul 29, 2020
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I would rather buy it just the kit if you're a DIY kind of guy.
Battery cell upgrades, Add Paddle assisted torque sensor crankshaft, Brake upgrades including quad piston as well as double line/double disc & various brands , Add Regenerative Breaking, Front & Rear Lights + Horn, Front Turn Signal Mirrors, Add Mudguardshafts & Fenders Options, Alarm System and Key Fobs, Moto Seat, GPS Tracker, Faster Charger
 

Delta Prime

Jul 29, 2020
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The 12000 watt motor on Enduro e-bike is a monster.
My 500 watt motor on my Shimano 27 gear speed mountain E-bike full suspension, fat tire rear drive can go over a 100 kilometers an hour, 65 mph. I have taken it on the freeways here in California.
Uphill 45 miles per hour on a 30% grade the power to weight ratio is outrageous. Scary fun!
 
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