EziWeigh5i, EziWeigh6i, EziWeigh7i, WOW2, DAS WOW2
Issue 2, 7/2017 21
Checking the battery
The indicator has a lithium iron phosphate (LiFePO4) battery fitted. The charging circuit on the PCA
controls charging. Charge indication is by measurement of the battery voltage.
Caring for the indicator battery
Charge the indicator overnight before and after use (especially after storage).
Always store the indicator at least half charged in a cool dry place (not in the sun).
To keep the indicator battery fresh, fully charge the indicator overnight at least once every 6 months.
Even when you are not using the indicator, the battery will discharge by itself. Battery life is shortened
if the battery remains discharged for long periods.
The indicator can be charged off the supplied power adaptor, from a car charger (cigarette lighter
adaptor) or from a computer USB port. The charging time will be longer if using a computer USB port
or if the indicator is left turned on while charging the battery.
Battery information
• In normal operation, the indicator’s battery save feature will turn the indicator off when it has not
been used for over 15 minutes. This may give the impression that the battery has gone flat. Press
to continue weighing. This feature can be turned off through the setups menu on the
EziWeigh6i, EziWeigh7i, WOW2 and DAS WOW2.
• It is safe to leave the indicator on charge indefinitely.
• The battery cannot be over-discharged during use.
• The battery may not reach full charge in extreme temperatures.
• Battery run time may be reduced at freezing temperature.
Battery problems
If there are doubts about the battery capacity, or if the battery doesn’t appear to hold its charge, test
the battery.
To test the battery:
1 Charge the indicator in a cool dry place for 5 hours at 10-45 ºC (50-113 ºF). The battery will not
fully charge if too hot or cold, or as quickly if the indicator is left on while charging.
2 Check that the charging symbol on the LCD is cycling during charging and displays full after
charging completed (disconnect power adaptor and wait a few minutes). If not charging, check
power adaptor, USB cable, power FPC, PCA and ensure that the indicator has the latest version
of firmware installed.
3 Remove the case back.
4 Measure the battery voltage. If less than 3.3 V, replace battery.
5 Disconnect battery and plug into battery test load (2 x 3.3 Ω 5 W resistors in parallel).
The battery voltage should be greater than 2.5 V after 1 hour. If not, replace battery.
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