Battery Installation:
♦Make sure the battery is loaded before operation.
♦First loosen two exterior screws on the external cover, remove the back cover lightly (do not break the signal line),
♦then load one 5th battery (not included in this counter, customer should buy it by themselves,the lifespan of common 5th battery is above half year.
♦While the battery with high performance, costing 2 Yuan, is more durable for more than 1 and half years,and next restore the back cover and two external screws.
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