Replacement cordless vacuum cleaner batteries. Suits Dyson SV10 and V8 range. Rechargeable Li-ion battery type. 21.6V 4Ah capacity.
1. Over-heat protection: The battery may not be able to recharge until it is cooled down.
2. Over-discharge protection: Recharge battery when LED flashes. If the battery has completely run-out, you may need to re-install the battery after recharging.