Lithium-Ion (Lifepo₄) Batteries; Low Current Mode - Victron energy Blue Smart IP67 12/7 Manual

2.9 Lithium-ion (LiFePO₄) batteries
Li-ion batteries do not suffer from sulfation.
But Li-ion batteries are very sensitive to under voltage or over
voltage².
Li-ion batteries therefore often have integrated cell balancing and
under voltage protection (UVP) circuitry.
Some reverse polarity protected chargers will not recognize a
battery when the UVP has tripped.
The Blue Smart Charger will however automatically reset the
UVP and start charging.
Important note:
NEVER attempt to charge a Li-ion battery when its
temperature is below 0°C.

2.10 Low current mode

Some lead acid batteries can overheat if charged with a current
exceeding 0.3C (C is the capacity in Ah. A 12Ah battery for
example should not be charged with a current exceeding
0.3 x 12 = 4A). The low current mode (charge current limited to
4A or less, see technical specifications) should therefore be used
to charge low capacity lead-acid batteries.
¹ For more information about batteries, please refer to our book
'Energy Unlimited' (downloadable from www.victronenergy.com),
or
http://batteryuniversity.com/learn/article/sulfation_and_how_to_pr
event_it
² For more information about Li-ion batteries please see
http://www.victronenergy.com/batteries/lithium-battery-12,8v/