Dodgy battery

evilrobotshane

I had a shipment of miscellaneous goodies in-bound from parts foreign a while ago, and threw in a spare battery for good measure. It didn't seem worth the hassle of chasing it up when it didn't work, and I figure I've nothing to lose by taking a scissors to it and hoping I get lucky.

It's dead flat, which I assume is the normal way for them to arrive, and won't charge. The charger gets warm and all, but the battery doesn't and is still flat. I'm imagining bad wiring somewhere, but don't know much about the topic. It's an 8.4v 1100mAh mini-type. Anyone any suggestions, and\or links to handy online guides or anything?

Rhinocharge

evilrobotshane wrote: »

I had a shipment of miscellaneous goodies in-bound from parts foreign a while ago, and threw in a spare battery for good measure. It didn't seem worth the hassle of chasing it up when it didn't work, and I figure I've nothing to lose by taking a scissors to it and hoping I get lucky.

It's dead flat, which I assume is the normal way for them to arrive, and won't charge. The charger gets warm and all, but the battery doesn't and is still flat. I'm imagining bad wiring somewhere, but don't know much about the topic. It's an 8.4v 1100mAh mini-type. Anyone any suggestions, and\or links to handy online guides or anything?

Before you take a scissors to it, have you checked the plug connector on the battery?

bullets

Is it NiMh or Ni-Cd ?

I got a Ni-Cd Large type battery before (2 in fact)
that just would not charge at all.

Buddy in work said it may need a quick super charge
for a min or two to get the cells to kick into play again as
if the cells go absolutly completely dead as a doornail sometimes there is touble getting the cells to charge again.
Also he said that once it does start taking the charge that
its best to trickle charge Ni-Cds as they should not be charged as fast as you would a NiMh.
(Not sure whats fact and whats fiction) Nothing worked
for my two batts.

I also noticed sometimes with Ni-Cds that they are slow
to register that they are charging I need to leave them
in the charger a min or two before the light goes green and tells me its charging.

Lastly there have been cased where the wireing in an AEG has been reversed.
My M14 what uses a Ni-Cd has the wireing reversed, and the battery that came
with it had the wireing reveresed too. So may be worth checking the polarities.

~B

evilrobotshane

Bollocks, sorry, I knew I'd forgotten to include something.

It's Ni-MH.

That's all good stuff to know though, thanks for posting.

Rhinocharge - I haven't done anything other than peer into the business end of the connector. Any idea what I'm looking for, and how to get the connector itself off and back on again?

Of course now I can't remember where I put the damn thing.

bullets

evilrobotshane wrote: »

Rhinocharge - I haven't done anything other than peer into the business end of the connector. Any idea what I'm looking for,

Look at the plastic connector, it could be that the Wire
that actually goes into the connector itself from the back
of the connector to the inner silver pins may not be
fully in so not making contact.

https://www.batterycole.com/xcart/images/P/Tamiya-stand-f-350w.jpg

evilrobotshane

bullets wrote: »

Look at the plastic connector, it could be that the Wire that actually goes into the connector itself from the back
of the connector to the inner silver pins may not be
fully in so not making contact.

Right, but what I'm wondering is how to get the pins out so I can check the connection. I mean, someone got them in there somehow, but I don't want to just yank on it unless that's what I'm supposed to do.

Masada

have ya tested it with a multi meter? you can test to see what kind of voltage is in it at the moment with a multimeter. it could be that one of the cells has a broken connection so it wont charge. if you use the meter on it and get nothing then this is likely the case. test it for continuity too.

evilrobotshane

No, I don't have a multi-meter, and we're straying dangerously close to easier-to-just-chuck-it-in-the-bin territory.

Masada

its actually really simple to use and you can buy cheap ones for less than a tenner. its something that should defo be in peoples airsoft tool kit.,

evilrobotshane

As an update to this, I recently got a smart charger, so plugged the problem battery into it to see if it'd recognise that it's there or what (previously I'd used an el cheapo charger that came with my Jing Gong shooty-stick). It charged up and is working perfectly now. Just goes to show you... something.