What are some important features of e-bike batteries

[brendo_88]

Hey all,
I am curious about what types of features everyone looks for in an e-bike battery. Personally, I look for reliability, but I am just wondering if anyone else cares for any other primary features.

 

[retiredNH]

Many of us with branded bikes, like my Trek, have no choice of batteries. For the rest of you who use generic batteries, I think you'll find there's a lack of information regarding batteries, other than the observation that cheap ones are more likely to fail. Some folks put stock in the kind of cells used in the battery, if that info is available.

Beyond reliability, where data is often lacking, most everyone is concerned with voltage and watt hours, but I'm sure you already knew that.

 

[mclewis1]

Aside from the obvious interest in cell brand/type and layout ...

Capacity - does the battery really deliver the marketing specs (amp/hr or total watts)?
Sustained amps - able to sustain a higher amperage draw without substantial voltage drop
BMS features - possible interaction for settings/data (WiFi or hardwire), cell balancing (only at full voltage?), charging rate (<4amp)
Build quality - cushioning from shocks, locking, snug fit in base
Charging port - is it a common connector, quality? suitability for higher charging loads
Quality connections with the base/external connector (robust and prefer gold connectors)
Weather/water proof levels
Availability of parts (new case/base, on/off switch, lock, charging connector, main connector)
Does the vendor stand behind the product?

 

[RunForTheHills]

Everything @mclewis1 said plus safety. Cheap no-name batteries are more likely to catch fire. And it is a chemical fire that you can't just throw a bucket of water on to put out.

 

[tomjasz]

EM3ev for DIY builders batteries or eBikes that use Reention shark syle poly cases. For compatible frame mounts.