The electric infrared heaters are a fairly new course. You may have first heard of your heaters advertised on radio stations. The news spread very quickly of the savings that may be made good use of in one's electric or heating bill.
The battery should be serviced. The posts and terminal ends should be investigated by a reputable and any water should be added in if possible. The battery should also be load-tested and how it can hold an electric power charge should be monitored.