They are alkaline button batteries. They are intended primarily for products requiring long-term durability at room temperatures, such as:
watches, calculators, electronic games, remote controls, etc. Their storage period is up to 3 years and the operating temperature is 0 °C to +45 °C.

GP LR44 button batteries are a cheaper alternative to silver oxide watch batteries (which are often hard to find). Although they have lower power, they will quickly and reliably solve your problem with dead batteries in all smaller devices with lower current consumption (flashlights, toys or watches) where long-lasting durability is a priority.

You can also find the LR44 battery under other names, but it's still the same "flashlight". Here's an overview of them:

AG13 A76 LR44 LR1154 SB-B9, 280-62, MS76, V76XP, S76E, AG357,1128MP, 1166A, D76A, G13A, PX675A, PX76A, RPX675, S76, V13GA, RW82, KA, A76, 208-904, SB-F9, G13-A, CA18, CA19, LR44, GP76A, L1154H, A-76, KA76, MS76H, CR44, LR44H, L1154G, LR44G, GPS76A, L1154C, L1154F, GDA76, A613 and LR44GD

 

capacity	110 mAh (at 1.6 kOhm load)
voltage	1.5V
type	GP A76F (AG13, LR44, LR1154, V13GA, PX76A)
operating temperature	0°C to +45°C
number of charging cycles	non-rechargeable
weight	1.7g
max. shelf life	3 years
mark	GP
dimension	11.6 × 5.4 mm
sales packaging	1 pc, blister