A relative's old Olympus TG-3 devours batteries faster than its shadow and for years it has been chaining third-party brand batteries, many of which have not held their charge beyond a few months.

I don't yet have the necessary perspective to say whether this will be the case on these or not, but they are well recognized by her device, and their lifespan after several outings on several full charges is a little below that of the original batteries. The dual charger that plugs in either USB-C or micro-USB does its job perfectly, but it's a classic charger, rather slow with a charge indicator for each battery and protections against overcharging, overheating and other.

The original LI-92B 1350mAh batteries are €49 each for the official versions at Olympus (= OM System now), while here this kit with 2 DB-110 1100mAh batteries and a double charger in addition is €30 excluding promotion at the time of this test. Although on a charge they last a little less than the original ones, the fact of having 2 for less is therefore worth the cost here, especially since the batteries are very small and easy to carry.