18650 lithium ion battery pack 3.7V 5000mAh is rechargeable and safe
Pulse 5000mah 50C 51.8V 14S Lipo Battery - No Connector – Rotorquest Inc.
DC 3.7V 5000mAh 955565 li-ion Lithium Ion Polymer Battery Replacement for DIY 3.7-5V Electronic Product, Mobile Energy Storage Power Supply : Amazon.ca: Electronics
Cylindrical Lithium ion Battery LPC26650A 3.6V 5000mAh 18Wh With Protection Circuit & NTC & Wires
Garberiel 18650 3.7V Battery 5000mAh (2-Pack) [JBL3109x2] : AVShop.ca - Canada's Pro Audio, Video and DJ Store
Gens ace 5000mAh 11.1V 3S 50C LiPo Battery Pack with Deans and XT60 Connector for Traxxas Models, Battery Packs - Amazon Canada
4 pcs 100% New High-capacity 18650 Battery 5000mAh 3.7V Rechargeable Lithium -ion Battery and 18650 Battery Charger for LED Flashlights | Walmart Canada
3.7 Volt 26650 Li-Ion Battery with Tabs (5000 mAh) | Walmart Canada
DC 3.7V 5000mAh 955565 li-ion Lithium Ion Polymer Battery Replacement for DIY 3.7-5V Electronic Product, Mobile Energy Storage Power Supply : Amazon.ca: Electronics