Users’ Manual
EDI-53 Series Digital Indicator
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37
BATTERY CHARGING AND CARE OF RECHARGEABLE BATTERY
Caution!
Always maintain internal battery in charged condition. Failure to do so will cause premature battery
failure. A battery which gets damaged due to non-compliance with the instructions given below is not
covered by our standard warranty and is also not eligible for free servicing.
The EDI-53 uses internal sealed maintenance free (SMF) battery as a power source.
A separate battery charger operating from AC mains supply is supplied with each indicator. A fully
discharged battery needs 16 hours of charge to get fully charged. A partially discharged battery will
require proportionately less time but the time is difficult to calculate. As soon as the battery is fully
charged the charging current gets automatically reduced to a safe value. Though the battery will not get
damaged if the charger is kept on for some time even after the battery is fully charged, it is recommended
that the charger be switched off.
On receiving the indicator for the first time recharge the battery for 16 hours through the supplied mains
powered battery charger.
If the EDI-53 is not going to be used for more than 15 days, fully charge the battery before storing the
indicator. Also fully charge the battery before use if the indicator has not been used for more than 30
days.
If the indicator is not going to be used for more than 30 days, recharge the battery at least once every 30
days or so.
The red “
LOW BATT
” lamp turns on when approximately 15 percent of battery capacity is left. Fully
recharge the battery at the first opportunity as soon as this lamp turns on.
The battery charger has two cords, one supplied with a two pin plug for inserting into an AC mains socket
and a round 3 pin circular plug for inserting into the 3 pin power socket of the EDI-53 indicator. The
charger does not have any separate power switch.
The rechargeable battery needs replacement every 3 to 5 years (irrespective of hours of use). Replace
battery with the same type or an equivalent from another manufacturer. The different manufacturers
specify battery rating as 6V / 4Ah, 6V / 4.2Ah, 6V / 4.5Ah etc, any of them can be used.
Battery replacement and disposal of discarded battery
Instructions on how to replace the internal battery or disposal issues regarding discarded battery is given
on a separate page at the end of this manual.
