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Some thoughts on Vistalight (vistalite?) batteries
Have you ever seen the discharge graph for NiCd batteries? It goes roughly: |............... V | : | : +==================== time I can tell you that NiMH feels about the same. The problem is that, as Murphy would have it, that abrupt turn in the graph corresponds to the curve you're riding down, in the rain, on the commute home from work. You've just about got time to to think "Hmmm, that light is looking a bit dull", and then a minute later it's just about out. Maybe it had been a bit duller earlier, but riding in those dawn/dusk times it's impossible to tell. This has led me to thoughts of other batteries. IMHO the vistalight 'nitestick' is not too bad, and I think for it's price it's good, I'm happy with mine anyway. I must remember to charge it every couple of days though. But each battery is only 2200mAh at 7.2V. Why is it such a bulky battery supplies only 2200mAh? I must be missing something. I know a photo shop that sells 2000mAh 'AA' batteries - admittedly AA is only 1.5 volts (which is really 1.2V talking NiCd/NiMH). Wouldn't 6 of these ganged together give me 12000mAh and probably weigh the same as a nightstick? Have I missed someting here? Can someone suggest a better SLA alternative? A nightstick battery (NiMH) costs about $70, a pack of 4 2000mAh AAs (IIRC) about $50 with a charger. cheers, -kt |
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