... overload capacity, low power consumption, light weight;6. Automatic cumulative record of the battery working hours;7. Round of ... the table number, bureau number, hours, rates, date, time, automatic meter reading date, password, display items and start recycling capacity;11. ... 25. Clock error: ≤ 0.5 sec / day (reference temperature); ≤ 1.0 sec / day (back-up lithium battery work6. Battery: lithium ...