Westfalia AHP 18 Original Instructions Manual page 24

 Note: Both the tool and the charger contain no user-serviceable parts.
If the device does not perform as outlined in this manual, turn to the
Westfalia customer service or to a competent professional.
 The battery can be recharged up to 500 times if treated carefully.
However, over time the battery's performance can deteriorate. If
necessary you can purchase a 4.0 Ah replacement battery under the
article number 87 84 75 from Westfalia.
 Store the device, the battery and the battery charger in a dry place,
and protect them from dust and dirt. Keep the device out of reach of
childen and persons in need of supervision.
Operation
20