V Power Batteries

ru
nl

I couldnt decide, I thought perhaps NL was correct as its the last, like the www.CanadaRules.CA or www.ItalyIsCoolToo.IT etc. but I figured I have a fondness for RU :) Been there 3 times! Im sure NL is great too. Brain Fart! :oops:
 
Just thought I would add my experience with VPower batteries bought on ebay. I bough mine and when it arrived put it on charge; al working fine excellent speedy charger at 6A for a 48V 20AH battery but when I tried to test in my e-bike it just didn't work.

I checked the voltage and realized that the polarity of the battery was reversed! So I opened it and swapped it worked fine since. Even the wiring diagram ont eh side of the battery was showing the polarity reversed, so I checked an old kettle plug lead (the same connector the battery uses) and sure enough both the battery and wiring diagram was wrong as my computer lead, e-bike and even my kettle polarity with the kettle adapter was all the same.

That is BIG MISTAKE to make for battery build....Thank god my cheap chinese e-bike controller had short circuit protection or I would have needed to buy new e-bike components from my own pocket because they sure as hell wouldn't pay for that!

Moral of the story: don't treat them like a company you buy from on the high street etc...check their products thoroughly before use! SERIOUS LACK OF QUALITY CHECKS!
 
shane_da_bean said:
Just thought I would add my experience with VPower batteries bought on ebay. I bough mine and when it arrived put it on charge; al working fine excellent speedy charger at 6A for a 48V 20AH battery but when I tried to test in my e-bike it just didn't work.

I checked the voltage and realized that the polarity of the battery was reversed! So I opened it and swapped it worked fine since. Even the wiring diagram ont eh side of the battery was showing the polarity reversed, so I checked an old kettle plug lead (the same connector the battery uses) and sure enough both the battery and wiring diagram was wrong as my computer lead, e-bike and even my kettle polarity with the kettle adapter was all the same.

That is BIG MISTAKE to make for battery build....Thank god my cheap chinese e-bike controller had short circuit protection or I would have needed to buy new e-bike components from my own pocket because they sure as hell wouldn't pay for that!

Moral of the story: don't treat them like a company you buy from on the high street etc...check their products thoroughly before use! SERIOUS LACK OF QUALITY CHECKS!
Click to expand...
I would suggest that one check polarity of ANY new battery, charger, etc., before plugging into an existing system - whether it came from V Power or anyone else. It takes 10 sec with a multi-meter and can save some grief.
 
this is true; but normally you wouldn't expect something that major and problematic to exist in a BRAND NEW battery; definitely making me check future batteries etc though lol. :D :lol:
 
Also, forgot to mention that I use it after fixing it and it takes me around 10-15 miles on a 30mph ride and if slowing down can reach up to 30 miles range... I mounted it on a bike rack that connect to the rear forks and seat post. works perfectly! :-D
 
So you are saying the kettle plug on the battery was not the same polarity as on your bike. What made you think it would be?

You always have to check polarity. what is normal for one china company may be opposite that of another. That's just china normal.

I blew two controllers, because I forgot that particular company wires the controller with the red wire negative.

You'll have 30 mile range at 18-20 mph for sure.
 
cheaper to build a battery you can get a 20AH lithium battery capable of 52 amps continous and 104 AMPS peak using these in 5s4p configuration so you need 20 lol or maybe more! :-D

http://www.hobbyking.com/hobbyking/store/__64789__Multistar_High_Capacity_3S_5200mAh_Multi_Rotor_Lipo_Pack_UK_Warehouse_.html
 
weight would also be only 6.62KG for a 15s lithium 20AH battery but 15s might be pushing the controller to its limits for some...I use 13s and have built a boost battery for 14s but 15s; I think i should get a new controller before that lol...


could also build a 40AH battery for around £500 that weighs in at 13.24KG and is 15s...looking forward to a long lasting 45MPH bike that should last around 40 miles range or about 25-30 with wind resistance and hard accelerating (up-hills), wheelies etc. lol im not doing this though...if i ever get to this situation i might as well upgrade to even more wattage and voltage and just buy a 72v system hehe.

thats far off though as mine is fine.
 
dogman dan:

yes that's what happened; should of guessed knowing the company site is called vpower.hk (hong kong) that it would need a more thorough looking at before just plugging and playing.
 
What motor and controller are you running ? 48v 20ah is good for 28-30 miles @ 30mph on flat land. Is this lifepo4 have you left it on the for hours to balance ? Maybe there's some more in there ?
 
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