Batribike Granite Pro bought (knowingly) with dead battery - advice please!

[robintb]

Hi, Apologies if the info I'm after is already distributed about this wonderful forum but thought I'd ask some specific questions...

I've just bought a 2014 Batribike Granite Pro, with a supposed dead and totally unresponsive battery, or at least one that needs re-celling, however on getting it back, plugging the charger in, the following happened:

First off, it wasn't interested in charging, but when I switched the battery to the on position (on the actual battery), the red charge light on the charger came on. I wasn't sure how safe this is (??) anyhow, I switched it back off but left it connected to the chrager which then showed green. After 20minutes, I decided to put the battery back on the bike, and there was power to the computer! Whats more, I just took it for a 3-4 mile ride!

So I was totally unexpected that it works at all.

So this brings me to several questions...I understand that some of the battery cells might be dead or on the way out, and therefore could it be that the BMS is intermittently allowing voltage in/out?

Whilst riding it, the computer showed 5/5 bars of juice for nearly the whole time, occasionally dropping to 4, yet the battery charge indicator on the actual battery is red (<30%). Whats the craic here?

The power cut out twice while riding it - I repowered and away I went again.

So I'd love some helpful thoughts on whats going on here....I suspect the battery is on its way out ( its done 1400miles but probably been left idle in a state of discharge for some time) and needs investigating, but also its now hapilly charging (red light on charger, battery switch is off this time).

Thanks!

Robin

 

[vfr400]

Some batteries need to be switched on to charge.

Never take any notice of battery indicator LEDs because there's all sorts of things that can make them unreliable. instead, measure the battery voltage with a meter as soon as you take it off the charger. The voltage can give an indication of health, depending on the battery type and what the voltage is.

 

[robintb]

Thanks for the help. Will test after next charge, assuming it does!

 

[Gordon R]

Hi, Apologies if the info I'm after is already distributed about this wonderful forum but thought I'd ask some specific questions...

I've just bought a 2014 Batribike Granite Pro, with a supposed dead and totally unresponsive battery, or at least one that needs re-celling, however on getting it back, plugging the charger in, the following happened:

First off, it wasn't interested in charging, but when I switched the battery to the on position (on the actual battery), the red charge light on the charger came on. I wasn't sure how safe this is (??) anyhow, I switched it back off but left it connected to the chrager which then showed green. After 20minutes, I decided to put the battery back on the bike, and there was power to the computer! Whats more, I just took it for a 3-4 mile ride!

So I was totally unexpected that it works at all.

So this brings me to several questions...I understand that some of the battery cells might be dead or on the way out, and therefore could it be that the BMS is intermittently allowing voltage in/out?

Whilst riding it, the computer showed 5/5 bars of juice for nearly the whole time, occasionally dropping to 4, yet the battery charge indicator on the actual battery is red (<30%). Whats the craic here?

The power cut out twice while riding it - I repowered and away I went again.

So I'd love some helpful thoughts on whats going on here....I suspect the battery is on its way out ( its done 1400miles but probably been left idle in a state of discharge for some time) and needs investigating, but also its now hapilly charging (red light on charger, battery switch is off this time).

Thanks!

Robin

Hi Robin

I have two of these Granite pro's . One was given to me from my brother. It kept cutting out and was working intermittently. I could swap parts to find the problem through process of elimination. It was definitely the battery. I checked the cells and they seemed ok and was fully charged but still cutting out intermittently. My bike started doing the same. I happened to look at the 30amp fuse( undo the small screw at the bottom end of the battery) It was corroded and pitted. I filed and cleaned it. Unbelievably the bike works fine now and it was the same problem on my brothers bike. This was only yesterday but i should replace the fuses.
My bike has done 8000 miles and my brothers 4000 miles
This might work for you.

Gordon

 

[robintb]

Hi Gordon

That's a great tip will check the fuse

Thanks!