Generally yes, but there are types of batteries which are subject to more restrictive regulations e.g. wet batteries or lithium batteries.
Non-collapsible wheelchairs with non-spillable wet batteries or dry batteries:
The battery must be securely attached to the wheelchair. Electrical circuits must have been inhibited and the battery terminals protected from short circuits.
Non-collapsible wheelchairs with spillable wet batteries:
Provided that the wheelchair can be transported (loaded, unloaded, stored, secured) always in an upright position, the battery may remain installed in the wheelchair. Electrical circuits must have been inhibited and the battery terminals protected from short circuits.
If the wheelchair cannot always be transported in an upright position, the battery must be removed. Electrical circuits must have been inhibited and the battery terminals protected from short circuits. The battery must be carried in a strong, leak-tight packaging, which has to be marked and labeled and be secured accordingly.
Collapsible wheelchairs with lithium batteries:
When the battery can be removed, it must be protected from short circuits and from any damage. The battery must be carried in the passenger cabin.
The battery must not exceed 300 Wh. A maximum of one spare battery not exceeding 300 Wh, or two spares each not exceeding 160 Wh may be carried.
The Pilot-in-command must be informed about the location of the wheelchair with an installed battery, or the location of the lithium battery when removed and carried in the cabin.
It is recommended to make advance arrangements with the operator.
Collapsible wheelchairs with non-spillable wet batteries or dry batteries:
When the battery can be removed, it must be protected from short circuits. The wheelchair then may be carried as checked baggage without restrictions. The battery must be carried in strong, rigid packaging in the cargo compartment. The wheelchair and its battery must be labeled with a “Battery powered wheelchair label” which consists of two parts. One part will identify the packed battery, the other will indicate if the battery has been removed or not and will assist in reconciling the battery and its wheelchair, if the battery has been removed.
The Pilot-in-command has to be informed about the location of the packed battery.