Can I get a universal ebike battery

[Leemi1982]

Hi I have a carrera vengeance ebike just wondering about a second battery do I have to get the manufactures own battery or is there a universal battery I can buy... bosh seems to keep popping up.

I just checked my battery health it’s showing 80% after a full charge, bike and battery are only 2 weeks old only had 3 charges from new???

 

[raleighnut]

Hi I have a carrera vengeance ebike just wondering about a second battery do I have to get the manufactures own battery or is there a universal battery I can buy... bosh seems to keep popping up.

I just checked my battery health it’s showing 80% after a full charge, bike and battery are only 2 weeks old only had 3 charges from new???

They need to fit the same mounts and have the same contacts (position and polarity) then there is the charger compatibility.

 

[welsh dragon]

I don't think you can change to another battery.

 

[cyberknight]

if its down to 80 % after 3 charges i would have thought you could have taken it back.

 

[Leemi1982]

Yeah I took the battery into Halfords yesterday and the guy seemed a bit clueless To what I was showing him so he got the manager out he seemed no better. they compared my battery to a display model in shop and said that they show the same. Felt a bit fobbed off walking out

 

[raleighnut]

if its down to 80 % after 3 charges i would have thought you could have taken it back.

80% is the optimum charge level for longevity of the battery, it's what most manufacturers recommend

 

[CXRAndy]

If your charger is stopping charge at 80% of maximum then its protecting it from over charging.

Most li-ion cell batteries are 3.6 Volts nominal voltage, fully charged at 4.2 Volts.

Im assuming that your bike is a 36 Volt battery, so nominal charge is 36 Volts. Peak max around 42 Volts. It will be a 10 cell series design with several of these in parallel to give increased current capacity.

Charge your battery and measure voltage at the point is reached fully charged on the charger, it should be 42 Volts and definitely 36 Volts and more.

Take battery off bike and use digital meter on terminals

 

[Levo-Lon]

Quote of the day.".halfords staff seemed clueless"

 

[Levo-Lon]

Quote of the day.".halfords staff seemed clueless"

You probably can buy a generic battery as the fitting bracket on on the frame bikes are detachable on some bikes like older Bosch

 

[ebikeerwidnes]

How are you measuring the battery health?
If you are just using the meter on the battery/bike then it should show fully charged - if not then the shop should change it

DO not trust the demonstrator battery - I have seen a few ebikes in Halford that have been sitting there for a while without being used - and the batteries don;t really like that

 

[cyberknight]

80% is the optimum charge level for longevity of the battery, it's what most manufacturers recommend

fair enough