Originally Posted by rekmeyata

And why would someone not be confident of their on board charger? I've had mine now for 2 riding seasons and it charges the batteries just fine, it's a smart charger too instead of a timed charger that can overcharge batteries if their not run to dead prior to charging. My original light came with a battery that would not charge right, so I contacted Philips, they sent me a new light/charger/batteries and that one is fine. The huge advantage with using AA bats is that you can buy more at any store, but I would make sure the new bats have at least the same amp hour rating as the ones from the factory.

Originally Posted by MrCjolsen

Hmmm. I'll need to do a test run after having charged good batteries with the onboard charger. Do you think it was my batteries? As of right now, most of my rechargeables are at least a year old.