User Manual

RS02109/0814/CD 14 www.cdtechno.com
Part 7 - Initial Charging
General Information and Precautions
To safely charge the Liberty 2V batteries and avoid damaging the batt er y and/or connected equipment,
observe the followi ng:
• Use a constant voltage charger with only direct current (DC). AC ripple current from charger
shall not exceed (5%) of the 8-hour (ampere-hour) rating of the battery.
• Be sure charger is turned off before making electrical connections between the battery and system.
• Connect via the appropriate size cable. Verify polarity with a volt meter before making final charger
connections and turning on the charger.
• Be cert ain that all con nections are tig ht and secured before turning on t he charger.
The recommended method of providing an initial/freshening charge (section 5.2 and section 7.1 & 7.2) is to
first determine the m axim um allowabl e voltag e that m ay be applied by t h e c on nected eq u ipme nt .
Divide this by the number of cells in the battery to obtain maximum average voltage per cell allowed
by the equipment. Adjust this number to a recommended value found in Table 1 and continue charging at
this voltage.
NOTE:
Charging current to the battery should be limited based on the Am pere Hour capacity
of the battery. Refer to Table 1 for maximum charging current. Higher charging current
can cause overheating that subsequently increases the internal resistance of the battery,
which requires additional current to compensate for the increased internal resistance.
This cycle is referred to as “thermal runaway”, w hi ch has the potential to destroy the
battery and cause damage to equipment.