Does it make sense to get rechargeable batteries? For this calculation, we’re going to assume our electronic device needs 4 x AA batteries. Standard Batteries We’ll use Duracell AA 1.5V Alkaline batteries rated at 2200mAh. Cost per 4 pack is £3.50 at Tesco Total cost: 25 packs at £3.50 = £87.50   Rechargeable Batteries Rather