Batteries work well they come in a plastic cap you just pop one out and the rest stay attached until you need it. I've only put it in the watch so I'm not sure about the longevity of the charge, but with 100 batteries I'm not particularly concerned.
TalentCell 9V Lithium Ion Battery: High Capacity 500MAh Rechargeable Li-Ion Polymer Battery With Micro USB Charging Port - 1-Pack For Ultimate Convenience
27 Review
EBL 16-Pack AA AAA Rechargeable Battery Combo - 8X AA 2300MAh & 8X AAA 800MAh Batteries
30 Review
Long-Lasting High-Performance EBL AA Batteries - Pack Of 28, Leak-Proof Design, 1.5V Double A Alkaline Power
29 Review
EBL 8 Pack Lithium AA Batteries - Powering High-Tech Devices With 3000MAh Capacity At A Constant 1.5V
37 Review
Effortlessly Clean Hard Floors With DEERMA'S 360Β° Rotation Spray Mop - Includes 8 Microfiber Refills And 350Ml Water Tank
42 Review
20 Foot High Reach Duster For Cleaning Kit With 5-12Ft Heavy Duty Extension Pole, Sturdy Extendable Microfiber Feather Duster, High Ceiling Fan Duster, Cobweb Dusters, Window Squeegee Cleaner Kits
35 Review
Dunlop SP Sport Maxx 050 235/55 R17 103Y summer
41 Review
Xiaomi Mijia Automatic Foam Soap Dispenser MJXSJ01XW/MJXSJ03XW, white
95 Review