that’s a fair point. 
It’s like. battery low… i will cut the load… but me? me? im special. i get power.
4 Likes
What is the exact smart BMS? Just so anyone else can avoid it happened to them
5 Likes
sorry to hear, I’ve seen this happen a few times. Generally happens with dud units.
1 Like
Whack, I’ve never seen This happen before. Is it possible the voltage precision was set too low and passive balancing was activated?
1 Like
Unfortunately your battery wasn’t the only battery that died while it sat. @DEEIF supersport battery died too because of vici wiring it wrong. Smart bms drain is funky, always unplug bms if you are going to let it sit
1 Like
Hmmm?
2 Likes
A BMS manufacturer shipping dud units means they are a shitty BMS manufacturer.
1 Like
I guess there is no good BMS manufacturer.
3 Likes
How do you know they are duds?
2 Likes
i never got to look at it. probably however it was set from the factory. Maybe I can try to set myself up to power it on and see if I can get the settings.
1 Like
Factory settings wouldn’t have killed it. But yeah let’s see if we can take a peak at them
watch idle drain. if its significant you got a dud
Can they be turned off with the 2 wire plug?
just had my supersport sit for nearly 6 months at 3.8v. cells are fine
1 Like
I had the bms app connected on a phone I rarely use and that drained a battery pretty quick.
2 Likes
It was a custom battery
1 Like
This is practically enough to ditch an entire BMS manufacturer.
A BMS is a critical safety device
This should absolutely be part of the manufacturer’s QC process prior to shipping them, and, if not, then they are a terrible BMS manufacturer and in need of replacement.
1 Like
Brian i’ve seen multiple of any bms fail. This is tinfoil hat logic. QC isnt flawless.
2 Likes
First time I got a dud from Bestech I never bought or used another BMS from them ever again, and no other company is different.
This is like a fire extinguisher that shoots confetti instead of carbon dioxide.
Evan, a BMS is a safety device, and children’s lives can depend on it not being shitty, and being tested prior to shipping, even if that costs an extra $0.10 off their bottom line.
4 Likes