Simply place battery(batteries) into the charging slots. Make sure you put batteries in with correct positive and negative poles.
eBay
ICR 18650 Battery 3.7 V 2000mAh 25A Lithium Rechargeable Battery Suitable for Flashlight LED Lights Laptop Intercom Instruments
Aliexpress UK
18350 Battery for Torch, Laser, Light, Gimbal. Battery Size: 18350. Nominal Capacity: 1600mAh. Physical Battery Size: 18mm x 36.50mm. Fully UK / EU CE Battery regulation & Compliant cells. Version: Button Top.
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NEEWER D Tap to LP-E6NH Dummy Battery with Cable for V Mount Battery Stable Continuous Power Supply for Canon EOS R5 C R6 Series
Aliexpress UK
Battery: 14500. 14500 Battery Widely used for Light Torch, Headlight, Laser Pointer, Diving Torch. Nominal Capacity: 1500mAh. + Free protective plastic case. Version: Flat End. Protection Circuit Board PCB: No.
eBay
Original replacement battery 21.6 V 5000mAh for samsung jet 70 VS15T7032P4 VCA-SBT90E Vacuum Cleaner Batteries
Aliexpress UK
Equipped with a built-in smart protective PCB charging module, they safeguard against overcharging, over-discharging, overcurrent, and short circuits, ensuring safe and efficient use. PICK UP OPTION.
eBay
18650 MJ1 Li-ion battery 2s1p 1s3p 3s2p 4s2p 5s2p 6s2p 18650 power pack 3500 MAh 18 V screwdriver 18650 recharable battery
Aliexpress UK
Good quality, 18500 tabbed battery.
eBay
7.4V 1500mAh Lipo battery For Wltoys 12428 144001 A979-B RC Car battery Spare parts 2S 7.4 V 1500 mah 903462 T plug or charger
Aliexpress UK
Model: 102050. Capacity: 1000mAh.
eBay
Original replacement battery 21.6 V 5000mAh for samsung jet 70 VS15T7032P4 VCA-SBT90E Vacuum Cleaner Batteries
Aliexpress UK
Equipped with a built-in smart protective PCB charging module, they safeguard against overcharging, over-discharging, overcurrent, and short circuits, ensuring safe and efficient use. Model: 501515. PICK UP OPTION.
eBay
100% Original high quality 26650 battery 18800mAh 3.7 V 50A lithium ion battery for 26650 LED flashlight + charger
Aliexpress UK
Battery Volt: 3.7V, Battery capacity: 1200mAh Plug Type: SM Connector Battery Size / Weight: 6.6*1.8cm /40g Function: As a spare battery for a your remote-controlled car and can extend the playing time Quality Guaranteed:1200mAh adequate battery capacity. Product description Note: 1.Please turn off the power switch and unplug the battery connector after use 2.DO NOT Attempt to open ,disassemble the battery pack 3.DO NOT Crush,puncture,short external contacts or dispose of in the fire or water 4.DO NOT Expose to temperature above 60°ˆ140° 5.DO NOT Overcharging and over-discharging Package Including 2 * 1S 3.7V 1200mAh lipo battery 1 * USB Charger Sirecal 2PCS 1S 3.7V 1200mAh Lipo Battery with USB Charger Cable SM Plug for RC Car Vehicle Off Road Boat.
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3.7V 380mah rechargeable Lipo battery with 5in1 charger for SYMA X21 X21W Battery quadcopter Quadcopter spare parts 3.7 V 762725
Aliexpress UK