4.3 Charging
• The battery must be fully charged before first use.
• Ensure charging voltage does not exceed 14.6V. 14.4V is recommended.
• Ensure the charging current does not exceed the maximum charging current as indicated in the
specification sheet. Any inrush current may activate the short circuit protection function and charging
may stop.
• Ensure charging is carried out at an ambient temperature within the recommended range of 0°C~45°C.
Below 0°C or above 45°C may cause irreversible damage (i.e., permanent loss of capacity) to the battery or
even a safety risk.
• DO NOT charge the battery for more than 24 hours. Disconnect the LFP battery from the charger when the
charger is no longer in use.
• DO NOT use a lead-acid battery charger if it has ‘Equalisation’ and ‘De-sulphation’ mode or function.
• DO NOT leave a lead-acid battery ‘smart’ charger connected to float charge the LFP battery. This type of
charger will NOT maintain a proper voltage algorithm and can cause damage to LFP battery.
• Batteries connected in series do not need to be disassembled for individual recharging. However, each
individual battery should be fully charged before being connected in series or parallel. Even after the
charger is disconnected, the battery may not be ready until the cells are balanced. After charger has been
disconnected allow 30 minutes rest time for the battery cells to balance.
• If charging batteries in series, ensure the charging voltage is less than 14.6V times the series number.
For example, to charge 2 LFP batteries in series, the charging voltage should be less than 29.2V and the
charging current should be as recommended in the specification sheet.
• DO NOT connect more than 2 LFP batteries in parallel. The voltage difference between the 2 LFP batteries
must be below 100mV after being fully recharged and before the batteries are connected. The maximum
charging current should be the same as single battery connection.
• Some constant voltage chargers that require the detection of battery terminal voltage to start charging may
fail to activate the LFP battery from its state of under-voltage protection (Sleep Mode). The low impedance
of LFP cells may result in an inrush of current interrupting the charge. If the charger trips out, reset the
charger until charging continues normally.
CHARGING CHARACTERISTICS
Voltage (V)
14.9
14.4
13.9
13.4
12.9
12.4
11.9
0
10
20
30
40
50
60
70
80
90
100
110
Capacity (%)
0.1C
0.2C
0.5C
1C
ADVANCED LiFePO4 TECHNOLOGY
LITHIUM
14