186500 Batteries ideal for DIY Battery Builders wanting to save Cash on theses Cells . People buy these Bike Battery Packs Brake them Down remove dead cells and use others to build Bike Batteries and Power Banks . So if you Brought New 18650 cells would cost £4. to £9. each We can do a pack say Containing 40 cells and the BMS still Fitted for £20.00 per pack = . 50p per cell E mail us Via Preloved Letting us Know what you need We are MOTORSAVERS CORBY LTD Also have Li - Polymer Packs .