Magicshine batteries?

[chris_s]

@dasgeh 100605 wrote:

I believe the batteries for our Magicshine lights are dying — they only last about 30 minutes. Googling hasn’t turned up any replacements that have the same amperage, voltage and wattage that my current ones have. Thoughts? Suggestions? Can I use ones with different Ah/V/W?

If it helps, the one I have is 4.5Ah, 7.2V, 32Wh

You really only have to worry about the voltage. Amp hours (Ah) is capacity – the higher it is, the longer it lasts. Watt Hours (Wh) is another way of stating capacity – it just multiplies Amp hours times voltage (4.5 X 7.2 ~= 32)

[jabberwocky]

I think any of the generic chinese light batteries would work ok. Almost all bike lights are designed to run off 2 cell li-ion packs (li-ion batteries are generally 3.6-4.2 volts per cell depending on charge level). 4 and 6 cell packs just have additional cells wired in parallel to get additional capacity (wiring two packs in series adds their voltage but keeps capacity the same, wiring them in parallel keeps voltage the same but adds capacity). So its mainly finding a pack that has the right connector.

Its not something you want to mess up though. Improperly charging or discharging a li-ion pack can be… spectacular, in a fiery way.

[jabberwocky]

Magcishine USA does seem to have replacement batteries for sale:

http://www.magicshineusa.com/products/batteries

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