RC battery Help

Author
Discussion

oldskoolgent

Original Poster:

128 posts

55 months

Wednesday 22nd April 2020
quotequote all
Attempting to recommission my sons GrassHopper - ordered two replacement battery's @2100ma.
Plugged into car and had a blast for 20 mins or so - however now when i've plugged them into the charger I was given (Vector NX85) nothing seems to happen.

The power indicator illuminates,
The fast charging indicator stay's unlit
The charged / trickle stay's unlit

I've tried using 1.0A and 2.0A selections ?
Any ideas ?

sausage76

360 posts

130 months

Wednesday 22nd April 2020
quotequote all
What type of batteries are they? NiCAD/LIPO?

Have you got them connected right?

300bhp/ton

41,030 posts

197 months

Wednesday 22nd April 2020
quotequote all
oldskoolgent said:
Attempting to recommission my sons GrassHopper - ordered two replacement battery's @2100ma.
Plugged into car and had a blast for 20 mins or so - however now when i've plugged them into the charger I was given (Vector NX85) nothing seems to happen.

The power indicator illuminates,
The fast charging indicator stay's unlit
The charged / trickle stay's unlit

I've tried using 1.0A and 2.0A selections ?
Any ideas ?
How did you charge them before use? If both are not charing, then it is either an issue with the charger or user error most likely.

oldskoolgent

Original Poster:

128 posts

55 months

Thursday 23rd April 2020
quotequote all
Sorry forum wasn't letting me reply till now ...

Fully agree it's user error, but i just dont see where.
The batteries are NIMH stick type. The charger has a tamiya type connector, as do the batteries - so Im' not sure it's possible to connect them up incorrectly.
This is the charger ,,,



ignore the connectors being unplugged etc, i'd ran out of hands wink

300bhp/ton

41,030 posts

197 months

Thursday 23rd April 2020
quotequote all
lol, not saying it was user error. But it would be unlikely that 2 batteries would fail at the same time. Therefore it leaves only 2 options:

1. The charger has gone faulty or has a problem (blown fuse etc.)
2. The charger is fine and you did something wrong

If you don't think it was number 2, then it must be number 1.

NiMh can be a pain to charge though sometimes. They can false peak and don't like to be too flat either (unlike NiCd).

Getting yourself a modern smart charger might be an option and maybe a multi meter so you can check the batteries.

I use one of these:
https://www.ebay.co.uk/itm/IMAX-B6AC-LCD-Digital-R...

However there are loads of options these days. But you don't need to spend loads on a charger if you don't want too.

And a multimeter like this is handy to have:
https://www.ebay.co.uk/itm/DIGITAL-MULTIMETER-VOLT...

Murph7355

38,887 posts

263 months

Thursday 23rd April 2020
quotequote all
Are you just poking the loose black wire back into the Tamiya connector?

As your batteries are new I'd replace the charger. Smart chargers don't cost that much (I just bought one from Overlander) and will likely better look after your batteries.

oldskoolgent

Original Poster:

128 posts

55 months

Thursday 23rd April 2020
quotequote all
crimped it back into place earlier.
will read up on smart controllers then....