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Thread: AGM Battery

  1. #11
    Join Date
    Apr 2009
    Location
    Gold Coast
    Posts
    489
    Quote Originally Posted by drivesafe View Post
    Hi Pat and while I know nothing about that brand, but the initial recharge current limit of 30 amps, which is just 20% of it's capacity, is not that good for a new battery.

    Most AGMs these days have an initial recharge current limit 30 to 35%, which would put the charge current at around 45 to 50 amps.

    It just does not sound right.
    Thanks, didn't buy it but still need one, is there a brand you would recommend?

    Also what about this spec, anyone know if this is good?

    Specifications
    • Nominal Voltage 12.8V
    • Nominal Capacity 120Ah@20 hour rate F.V.(1.80V/cell)
    • Approximate Weight 35.00Kg (77.50lbs.)
    • Terminals B3 (Fitting M6 bolt & nut) I2 is optional
    • ​Internal Resistance = O O4.5m (Fully Charged)
    • Maximum Discharge Current 1200A (5 sec)
    • Maximum Charge Current 25A
    • Operating Temperature Range Charge: -10C~40C (14F~104F)
    • Discharge: -20C~50oC (-4F~122F)
    • Storage: -20C~40C (-4F~104F)
    • Self Discharge 3% of capacity declined per month at (25C)

  2. #12
    Join Date
    Jan 1970
    Location
    Queensland
    Posts
    6,610
    Hi Patclan, that battery also has a rather low maximum charge current.

    At just 25A, it is no better that the last one you looked at.

    Try doing a google for 120Ah AGM batteries and see if you find any with around a maximum charge rat of 40 amps.

    I am not suggesting you buy them, but just check out and compare the different specs.

    Cheers, Tim.

  3. #13
    Join Date
    Jan 1970
    Location
    Logan
    Posts
    16,290
    My auto electrician put 60 amp fuses on the cable connecting my first and second batteries, so 25 amps isn't much. There are 240 volt chargers pumping out 30 amps or more. Your vehicle alternator could also be making a lot more, maybe 80 amps? My new Anderson plug on the Defender for charging our new camper has 80 amp fuses. So 25 amps is low.
    2009 Defender 110 2.4. ARB bulbar, Ironman winch, Safari snorkel, Steinbauer chip, AP HD clutch, Lightforce spots, larger tank, Off Road Systems drawer, Traxide 160 controller, Tekonsha brakes, Mulgo seat runners, Uniden UHF, Nuggetstuff seat corners, breathers.

  4. #14
    Join Date
    Apr 2009
    Location
    Gold Coast
    Posts
    489
    Quote Originally Posted by drivesafe View Post
    Hi Patclan, that battery also has a rather low maximum charge current.

    At just 25A, it is no better that the last one you looked at.

    Try doing a google for 120Ah AGM batteries and see if you find any with around a maximum charge rat of 40 amps.

    I am not suggesting you buy them, but just check out and compare the different specs.

    Cheers, Tim.
    Thanks Tim,
    I am searching now. I have found searching for cheap alternatives very tedious and pointless.. I will now look for a decent one.

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