SL/R231: Lithium auxiliary batter
Thread Starter
Junior Member
Joined: Dec 2020
Posts: 47
Likes: 6
SL63 SL500 Toyota Landcruiser, S1000RR, Jaguar I pace
There are not any over the counter lithium batteries which are of a correct voltage for a 12v car system and if there were you could not use them because their charging and discharge characteristics are completely wrong. The Porsche Mercedes and batteries such as the Antigravity batteries use lithium iron phosphate cells with appropriate electronics to make them compatible. This allows them to charge on a normal car 12v circuit and maintain an appropriate circuit voltage. Some also contain a protection circuit which prevents complete discharge which could damage this type of battery.
The Antigravity has a built in jumpstart if this has happened.
Advantages are lightness and very low self discharge. I believe however that they are not so good at very low temperature.
I am sure other forum members will disagree with all of these statements!
The Antigravity has a built in jumpstart if this has happened.
Advantages are lightness and very low self discharge. I believe however that they are not so good at very low temperature.
I am sure other forum members will disagree with all of these statements!
Junior Member
Joined: May 2017
Posts: 61
Likes: 11
From: Phoenix
2015 SL400, BMW Z3, Datsun 280Z, a couple of jeep Grand Cherokee's - And a Commander Airplane
There are not any over the counter lithium batteries which are of a correct voltage for a 12v car system and if there were you could not use them because their charging and discharge characteristics are completely wrong. The Porsche Mercedes and batteries such as the Antigravity batteries use lithium iron phosphate cells with appropriate electronics to make them compatible. This allows them to charge on a normal car 12v circuit and maintain an appropriate circuit voltage. Some also contain a protection circuit which prevents complete discharge which could damage this type of battery.
The Antigravity has a built in jumpstart if this has happened.
Advantages are lightness and very low self discharge. I believe however that they are not so good at very low temperature.
I am sure other forum members will disagree with all of these statements!
The Antigravity has a built in jumpstart if this has happened.
Advantages are lightness and very low self discharge. I believe however that they are not so good at very low temperature.
I am sure other forum members will disagree with all of these statements!
Big Jets a different story - they are not subject to the same cold soak there.
Super Member
Joined: Jul 2018
Posts: 563
Likes: 171
From: Nothern Georgia, U.S.A.
'17 SL450, '25 Lyriq, '25 Sonata Hybrid, '96 Corvette GS coupe
Thread Starter
Junior Member
Joined: Dec 2020
Posts: 47
Likes: 6
SL63 SL500 Toyota Landcruiser, S1000RR, Jaguar I pace
The one I noted earlier is an auxiliary size battery and less sophisticated electronics. The reason you don’t need a standard CTEK maintenance charger is because it produces all sorts of changes in charging voltages specifically to treat a lead acid battery and maintain its function. This is quite different from what your alternator charging system produces. The Lithium CTEK charger produces a more maintained voltage similar to your car charging system and the electronics in the battery regulate the charging.
Super Member
Joined: Jul 2018
Posts: 563
Likes: 171
From: Nothern Georgia, U.S.A.
'17 SL450, '25 Lyriq, '25 Sonata Hybrid, '96 Corvette GS coupe
The one I noted earlier is an auxiliary size battery and less sophisticated electronics. The reason you don’t need a standard CTEK maintenance charger is because it produces all sorts of changes in charging voltages specifically to treat a lead acid battery and maintain its function. This is quite different from what your alternator charging system produces. The Lithium CTEK charger produces a more maintained voltage similar to your car charging system and the electronics in the battery regulate the charging.
