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Author Topic: NiMH Battery - An odd shape?  (Read 2208 times)

Steven.T

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NiMH Battery - An odd shape?
« on: December 31, 2013, 06:09:51 pm »
Hi guys,
Dug out a speed boat I bought from Netto (yes, the cheap shop that was bought out a few year back!) for my younger brother to use when I take my boat for a sail.
Problem is, I think the battery is totally dud. I've had it on a normal charger for about 3 hours and there is no voltage coming out of it when I unplug it. Besides that, it only lasts for about 10 mins anyway!


So, my question is, does anyone know where I can get a 7.2v NiMH pack, preferably higher than 1800mah that is an L shape, like this:



I've searched google and a couple of well known online model shops but I can't seem to find anything. A normal 7.2v Racing pack doesn't fit unfortunately!


Cheers,
Steven
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john44

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Re: NiMH Battery - An odd shape?
« Reply #1 on: December 31, 2013, 06:14:35 pm »
Component shop would probably help you out with that problem.
They do make up battery packs as required.

john
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grendel

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Re: NiMH Battery - An odd shape?
« Reply #2 on: December 31, 2013, 07:18:38 pm »
looks like a set of lead acid batteries from an electric drill, 6 cells would give 7.2V, I used to make up new packs for drills by buying odds battery packs in the sales at b&q, then taking them out of the case and fitting into the old one,,
Grendel
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malcolmfrary

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Re: NiMH Battery - An odd shape?
« Reply #3 on: January 01, 2014, 01:00:11 am »
Quote from: grendel on December 31, 2013, 07:18:38 pm
looks like a set of lead acid batteries from an electric drill, 6 cells would give 7.2V, I used to make up new packs for drills by buying odds battery packs in the sales at b&q, then taking them out of the case and fitting into the old one,,
Grendel
It looks like no SLA pack in the history of creation.  SLA packs are based on squared-off boxes.  They are also invariably based on multiples of 2 volts, that being the badic voltage per cell resutlting from the chemistry involved.  It does look a lot like a custom NiMH/NiCad pack.  In the case of NiMH packs, Component Shop could no doubt help, especially if given a picture.
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tigertiger

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Re: NiMH Battery - An odd shape?
« Reply #4 on: January 01, 2014, 02:44:33 am »
It looks like a custom assembly of smaller NiMh cells. All in heat shrink. Most packs are like this but usually in more regular shapes.

Component Shop or anyone who makes packs should be able to help you.
Easy to do yourself if you have the means to solder at very low temps, so as not to damage the cells.
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