Amazon.com: LiTime 12V 50Ah Lithium LiFePO4 Battery Built in BMS, 10 Years Lifetime 4000+ Cycles Output Power 640W, Perfect for Boat Marine Trolling motor Camping : Automotive
DC-100-V1 Lithium Deep Cycle Battery – Antigravity Batteries
Amazon.com: EBL Rechargeable AA Batteries (8 Pack) and Battery Charger with Built-in Charging Cable, 2300mAh Ni-MH Double A Rechargeable Batteries and 8-Bay LCD Smart AA AAA Battery Charger : Electronics
This AA battery I found has a built-in power indicator. : r/mildlyinteresting
Amazon.com: Ampere Time 12V 100Ah Lithium LiFePO4 Battery with Built-in 100A BMS, 4000-15000 Deep Cycles Lithium Batteries, Fast Charging & 10-year lifetime Perfect for Trolling Motor, RV, Solar, Off-grid : Electronics
batteries - How to use three-wire Li-Po battery with built-in thermistor? - Electrical Engineering Stack Exchange
Amazon.com: Power Queen 12.8V 300Ah LiFePO4 Battery, Built-in 200A BMS, Lithium Battery 2560W Power Output, Up to 15000+ Deep Cycles, 10-Year Life, Perfect for RV Camping, Marine, Truck, Off-Grid : Automotive
Built-In Battery Box Mods
Group-24 Lithium Car Battery – Antigravity Batteries
3500mAh Replacement Battery for PS5 Controller,Rechargeable Built-in Lithium Battery 3.65V for DualSense Game