You're replacing 3.2V LiFePO4 18500 Lithium Batteries, not 18500 3.7v Li-ion Batteries! 18500 3.2V Batteries. 18500 3.2V Batteries for Garden Solar Lighting: Roma, George, Solar LED Garden Light, Lights with or without sensor.
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Original Vapcell F15 INR 14500 Battery 1500mAh CDR 3A 3.7V Lithium ion Rechargeable Batteries AA Battery Cell For Flashlight
Aliexpress UK
Applicable batteries: lithium iron phosphate, lithium manganate, lithium cobalt oxide, ternary. Quantity: for 2 set(6pcs). Only a shell, there is no battery cell. Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
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18650 lithium akku Rechargeable Lithium Batteries 2000mAh ISR18650-2000 baterias 3.7v Lithium Li ion for Electric scooter
Aliexpress UK
Applicable batteries: lithium iron phosphate, lithium manganate, lithium cobalt oxide, ternary. Quantity: for 2 set(6pcs). Only a shell, there is no battery cell. Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
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1.5V D Size Rechargeable Battery LR20 Li-ion Batteries C Size Rechargeable Battery Type C USB Charging R14 LR14 Lithium Battery
Aliexpress UK
Applicable batteries: lithium iron phosphate, lithium manganate, lithium cobalt oxide, ternary. Only a shell, there is no battery cell. Quantity: for 2 set(6pcs). for 2 x Top Shells. Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
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2-50pcs EVE 26V ICR 18650 Battery 2550mAh CDR 7.5A 3.6V Flat Top Battery Rechargeable Lithium-ion Cell For DIY Battery Pack
Aliexpress UK
Applicable batteries: lithium iron phosphate, lithium manganate, lithium cobalt oxide, ternary. Only a shell, there is no battery cell. Quantity: for 2 set(6pcs). for 2 x Top Shells. Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
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36V 7800mAh 100% Original Xiaomi Battery Dedicated Battery Pack Lithium-ion Battery Scooter Electric Tool Batterys
Aliexpress UK
Applicable batteries: lithium iron phosphate, lithium manganate, lithium cobalt oxide, ternary. Only a shell, there is no battery cell. Quantity: for 2 set(6pcs). for 2 x Top Shells. Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
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Original Molicel P50B INR 21700 Battery 50A High Power Lithium-ion Battery 5000mAh 3.7V Rechargeable 21700 Battery Flat Top Cell
Aliexpress UK
Applicable batteries: lithium iron phosphate, lithium manganate, lithium cobalt oxide, ternary. Quantity: for 2 set(6pcs). Only a shell, there is no battery cell. Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
eBay
New 18650 battery 99900mAh 3.7V 18650-99900 lithium-ion battery rechargeable battery suitable for flashlight batteries, toys, va
Aliexpress UK
Applicable batteries: lithium iron phosphate, lithium manganate, lithium cobalt oxide, ternary. Only a shell, there is no battery cell. Color: Black. Quantity: for 2 set(6pcs). for 2 x Top Shells.
eBay
New 18650 battery 3.7V 9900mAh rechargeable Li-ion battery for Led flashlight Torch batery lithium battery
Aliexpress UK