Thread: Single lithium battery for cranking and auxiliary

Originally Posted by Ranga

Do you know if he's done any as a single cranking battery?

I dont think so,they do single Auxillary batteries,though.

Now that the technology is maturing, I’m going to replace my primary battery with one of these.

‘My only concern is robustness, i.e handling heavy corrugations etc, but the weight saving of around 18Kg once my current HD battery is replaced is more than welcome.

I run an ITech World 120 Amp Lithium in the rear as the accessory battery and its bullet proof, charging off a Redarc charger. I’m really happy with these units and purchase/delivery is painless.

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Aren't lithiums designed for slow discharge and so better as auxiliary batteries, while starting batteries are designed to give a quick large power boost?

What ever the starting requirements Mick, ITech World have sorted it and their Starter Lithium battery (as pictured) is rated at 1300CCA!, so it certainly suits our needs and my LS3 6.2 V8 starting requirements.

Defenders are well suited as obviously we run them outside of the engine bay anyway so no heat insult to the battery which was an issue for Lithium I believe.

Originally Posted by DiscoMick

Aren't lithiums designed for slow discharge and so better as auxiliary batteries, while starting batteries are designed to give a quick large power boost?

Hi Mick, you have to be specially careful when selecting lithium batteries because they vary greatly in what they can safely tolerate in both charge current and discharge current capabilities.

Lead Acid batteries, be they AGM or Wet Cell, also need to be selected according to required use.

A dedicated Deep Cycle battery will be slower to charge and are not that good for high current discharge situations.

BUT, there are now quite a few so-called Hybrid lead acid batteries that are both cranking batteries and deep cycle batteries.

Cranking batteries have always been able to be used as a deep cycle battery but the hybrid type usually allow for much deeper discharging.

With the large alternators being fitted to most vehicle these days, using a hybrid type battery, like an SSB HVT battery, you have a deep cycle battery that can be very quickly recharged with these large alternators.

This gives them a number of distinct advantages over both lithium and lead acid deep cycle batteries.

Originally Posted by Baytown

What ever the starting requirements Mick, ITech World have sorted it and their Starter Lithium battery (as pictured) is rated at 1300CCA!, so it certainly suits our needs and my LS3 6.2 V8 starting requirements.

Defenders are well suited as obviously we run them outside of the engine bay anyway so no heat insult to the battery which was an issue for Lithium I believe.

I see you’re running an electric winch…how many amps does it pull at full load compared to max discharge of battery??

I’m guessing worst case you you do a 2:1 pull to reduce load.

I run a PTO winch therefore no idea on current draw on electrics

Ive no idea re amps at full load but yep, I often do a 2:1 pull and always only run the winch for short periods.👍

Originally Posted by W&KO

I see you’re running an electric winch…how many amps does it pull at full load compared to max discharge of battery??

I’m guessing worst case you you do a 2:1 pull to reduce load.

I run a PTO winch therefore no idea on current draw on electrics

Originally Posted by Baytown

Ive no idea re amps at full load but yep, I often do a 2:1 pull and always only run the winch for short periods.

Cools, I’m just thinking the BMS will shut down the battery if you exceed the max. discharge current of the battery.

If this is what’s happen you may need to be familiar with how to reset the BMS when overloaded, it may even auto reset..

I have been wondering if there are any issues or limitation with winching using these start type lithium batteries.