Typical Battery/Charger Configurations
Attention: When you connect the charger connector to the battery pack, do
not push it down too far. Otherwise, the connector will not make contact with
the battery connector.
Power cords and power adapters
Use only the power cords and power adapters supplied by the product
manufacturer. The power cord and power adapter are intended for use with
this product only. They should never be used with any other product.
Batteries supplied by Lenovo for use with your product have been tested for
compatibility and should only be replaced with approved parts.
About the ThinkPad External Battery Charger