Over time the battery pack for your cordless Ergorapido vacuum cleaner can lose its ability to hold its charge. Fortunately, you don\'t have to buy a new cleaner, you can simply replace the battery pack with this new Li-Ion battery part. It has a voltage of 10. 8 V and consists of 3 batteries of 3. 6 V each. Fits Ergorapido ZB3101, ZB3102 and ZB3103. Note! Batteries are difficult to replace, we recommend that you buy a handset (engine and battery included) instead. Repair of electric appliances should be done only by skilled persons. Check compatibility before purchase.