Question about Bosch Home & Garden Battery pack PBA 18V lithium-ion

This battery fits your device without any problems and is a real improvement, I can only recommend it.
But: These new batteries are built differently and do not fit on the "old" charger; please check. The "old" batteries have the contacts for the charger at the back/bottom. With the new batteries, the charging contacts are the same as the unit contacts and the battery is inserted into the charger with the top side down. That's why I also ordered the Bosch AL1830CV charger. It can be used to charge both the old and the new batteries. If the battery in your current charger is inserted into the charger with the bottom side down, then you also need the new one.