2025 3V Lithium Battery by Duracell Inc. DUR66390CT | OnTimeSupplies.com
How to Calculate 18650 Lithium-Ion Battery Pack Capacity and Runtime
DIY Lithium Battery - I used the following pack calculator to work out the 4 cells: https://secondlifestorage.com/repackr.php As you can see below the cells are identical in capacity. Each cell has a