2pcs 18650 Battery Storage Case 2 Slots x 3.7V for 2x18650 Batteries Holder Box Container with ON/Off Switch (2 Slots with Switch Cover)

Works pretty well - not too tight, but holding the batteries in place.

fit my battery 3.7 volt

These blades worked, but were made with soft metals. The tips wore off in seconds cutting plaster, and wore off in less than a minute cutting hardened locust wood. If you need an aggressive cutting edge I would not recommend titanium blades

You need to be careful since the battery case doesn't always match up like it should might need to change the ends a little

These are wired in series, not in parallel resulting in double the voltage and not double the capacity.

I guess you get what you pay for on this. They're cheap for a reason. Luckily, you get two, so if one is a bust or breaks within 2 weeks, like one of mine did, you still have another.

Don't ever buy this product. They are not design correctly for the battery 18650. The center terminals of the battery housing don't line up with the center of the battery electrodes. Therefore, the type of plastic they built is so poor. If there is some reason you want to snap the cover back in, the battery clip will be damaged. Any hole you drill will crack on the housing too.I do not recommend these housing product to any one!

ACEIRMC 2pcs 18650 Battery Storage Case 2 Slots x 3.7V for 2x18650 Batteries Holder Box Container with ON/Off SwitchPositive node has poor connection with flat tip 18650. The tips in case is too short for 18650 flat tips.