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I've got one of the DX bargain £28 XML magicshine knock-off lights, and although it is thoroughly wonderful and it cheerfully burns holes through the night, the battery it came with is crap - about 1hr 20 on full.
This is not good enough, so I replaced the no-name cells in the pack with some from a spare laptop battery - result! Now I have about 2h 15 runtime on full beam.
However... I still have lots of spare laptop cells, and I'd like to make up a few spare packs for the light. The DX pack has a battery protection circuit in it which I think protects it from overdischarge and probably also balances the charging current. Where can I buy spare BPCs?
I'm tempted to omit them, but I don't think the driver in the DX light cuts off the light at low voltage, so it'd just drag the batteries down to 0v and kill them.
Any ideas?
No-one? Someone must have tinkered with bastid battery packs in the past, surely??
email [url= http://www.mtbbatteries.co.uk/ ]Mark/Smudge[/url], he helped me out with one
I use (re-use) old laptop cells without any problems so far. I got my pcb's from Battery Junction in the US. Get on their site & search for pcb. Postage is a bit steep so I bought a few of them at the time. I think I still have a couple of 7.2v & 14.8v for varying numbers of cells in the garage. If you are interested in any of these PM me.
have a look on ebay for li-ion pcb. There's plenty on there, I was going to build myself a couple of spare packs just to chuck in my backpack for emergency use - no idea if they are any good or not though.