Victron Energy AGM Dual Purpose Battery 12V 165Ah (M8) – BAT412151085
The Victron Energy 12V 165Ah AGM battery has very low internal resistance making them particularly suitable for high current discharge applications such as for inverters, thrusters and winches.
Features of the 12V 165Ah AGM battery
Sealed (VRLA) AGM Batteries
AGM stands for Absorbent Glass Mat. In these batteries the electrolyte is absorbed into a glass-fibre mat between the plates by capillary action. As explained in our book ‘Energy Unlimited’, AGM batteries are more suitable for short-time delivery of high currents than gel batteries.
Because of the use of lead calcium grids and high purity materials, Victron VRLA batteries can be stored during long periods of time without recharge. The rate of self-discharge is less than 2% per month at 20°C. The self-discharge doubles for every increase in temperature by 10°C.
Victron VRLA batteries can therefore be stored for up to a year without recharging, if kept under cool conditions.
Exceptional Deep Discharge Recovery
Victron VRLA batteries have exceptional discharge recovery, even after deep or prolonged discharge.
Nevertheless repeatedly deep and prolonged discharge has a very negative effect on the service life of all lead acid batteries,
Victron batteries are no exception.
Battery Discharging Characteristics
The rated capacity of Victron AGM and Gel Deep Cycle batteries refers to 20 hour discharge, in other words: a discharge current of 0,05 C.
The rated capacity of Victron Tubular Plate Long Life batteries refers to 10 hours discharge.
The effective capacity decreases with increasing discharge current. Please note that the capacity reduction will be even faster in case of a constant power load, such as an inverter.
Looking to protect the battery against excessive discharge, the BatteryProtect is just what you are after.
Learn more about batteries and battery charging
To learn more about batteries and charging batteries (including the pro’s and cons of multi-bank charging and intelligent charging), please refer to Electricity on Board.
Want to improve battery charging? Why not take a look at the Victron Energy Battery Sense which measures voltage at the battery bank terminals, errors arising from voltage-loss due to cable resistance are avoided – guaranteeing the correct charge-voltage.
Manufacturer Part Number
Battery Capacity (C20)
Left Hand Positive
Dimensions (Including Terminals)
L485 x W172 x H240mm
Country of Manufacture