The original Fairphone 4 battery combines all-day power (3905mAh) and fast-charging with our dedication to integrate fair cobalt and responsible lithium into the supply chain.N/AN/AN/AThe original Fairphone 4 battery has a lot going for it. It reliably keeps your phone up and running all day long. It comes with convenient fast-charging technology that jumpstarts you back to 50% of its 3905mAh capacity in half an hour (when using chargers with a 20W minimum). N/AN/AAnd its probably the worlds easiest and fastest spare part replacement. When the time comes to replace your battery you dont have to be an expert to swap it out in only a few seconds.N/AN/ABut wait theres more than meets the eye. Behind the scenes were innovating where it counts: Were working with the Fair Cobalt Alliance to integrate fair cobalt and responsible lithium into the supply chain. N/AN/AAbout as fair as they come!N/AN/APro-tip: Works great as a spare-battery too if youre on the go and need to double your battery-life.