Thanks to Ashton to bringing this thread back.

The chargers are a little flimsy, but work. They are "universal" voltage (110-220V) and will charge the batteries to ~ 4.1-4.2V. One of the contacts slides in the holder so it can charge batteries of different lengths. The contact shape is Ok, but the battery will easily rotate and shift in the holder, so it's not the most confidence-inspiring design, but it works.

It is possible to quickly switch between the 3 modes on the flashlight. When the flashlight is on, gently pushing the button in ~ 1/4-1/2 way will quickly move to the next mode. Repeat to move to the next mode.

If the light won't come on, or comes on but won't switch to the next mode, then the battery needs to be charged (or replaced). When fully charged, the bright mode is very bright but not extremely bright.

It's a good bargain for the light. A better charger might be available, but might cost more. The bundle is convenient.

HTH!

Cheers,
Scott.