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10. The batteries
Two 12V 7 Ah maintenance-free lead-acid batteries are used. They have an
expected life span of three years.
If the output voltage of one of the batteries is at least 5V less than that of the other, it
can be assumed the battery is faulty. If the voltage between the batteries varies,
there is something wrong with them.
Guarantee
No guarantee is provided for the batteries. However, we do ask that you report any
complaints to us, stating the identification number on the battery.