Join Date: Feb 2007
Location: Monument, Colorado
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Originally Posted by mc_burn
The owner's manual does not specify.
I believe I have the same light. Performance bike version with 10/15W halogen bulbs. My owner's manual says to discharge and then charge it for 9 hours. If you go this route discharge with a fan on the lights or they will over heat.
It's a NiMH battery pack, so technically it is not necessary to discharge, but how will you know how long to charge with the dumb slow charger if you don't. If you have a volt meter you could take readings periodically while it's charging and stop when the pack is charged, you may want to go through the discharge/charge cycle to determine what voltage you are looking for. Probably in the 7.25+ volt range if the pack is made up of 5 NiMH nominal 1.2V cells.
Edit: The manual defines discharged as when the lights start to noticeably dim, NOT when they are dead. FULLY discharging NiMH cells is bad for them and will reduce their life.