Old stock (been in storage for ~7 years after purchase), the voltage dropped due to self discharge but still at ~3.75V. Never used during storage. More than one available.

Originally for drones but the internal resistance had degraded a lot (see below) so probably no longer suitable. Can still be used for DIY electronics projects.

Visually they look fine, no signs of internal gas.

Measured internal resistances of one battery: AC impedance at 3.8V: 78 milliohms DC impedance when pulling 1A (1.7C) at 3.8V: 170 milliohms Tested capacity at 3A (5C, 4.2V to 2.8V): 560mAh

Has a built-in protector board (shown is from another identical battery).

Measures about 25x47x9mm.