I tried different brands of watch batteries, these turned out to be optimal in terms of price / quality ratio. And for dozens of batteries at once, the price is just great!
16 Count EBL AA Rechargeable Batteries 2800MAh Ready2Charge Quality
43 Review
Long-Lasting EBL 9V Lithium Rechargeable Batteries With USB 5400MWh Capacity (Pack Of 2)
35 Review
EBL 8 Pack Lithium AA Batteries - Powering High-Tech Devices With 3000MAh Capacity At A Constant 1.5V
37 Review
EBL 8-Pack Rechargeable Lithium AA Batteries With Smart Charger - Long-Lasting 1.5V AA Li-Ion Batteries
45 Review