I would choose AGM over EFB any day.
EFB are just an attempt at getting AGM like performance at a cheaper cost.
AGMs have a higher rest voltage too. .. (which is good)
VW fitted me a VARTA AGM starter battery and a EFB Leisure battery . . . why? well the leisure battery had to be EFB or AGM as the factory spit charge relay just connected the batteries together . .
So EFB for the rapid higher charge rate due to stop / start . . . but cheaper than the AGM equivalent.
see the testing:
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EFB are just an attempt at getting AGM like performance at a cheaper cost.
AGMs have a higher rest voltage too. .. (which is good)
VW fitted me a VARTA AGM starter battery and a EFB Leisure battery . . . why? well the leisure battery had to be EFB or AGM as the factory spit charge relay just connected the batteries together . .
So EFB for the rapid higher charge rate due to stop / start . . . but cheaper than the AGM equivalent.
see the testing:
Stop/start...regen...smart Alternator... Dc-dc Charger For Leisure Battery Or Not?
So With all the talk regarding the Bluemotion thing and regen breaking and leisure batteries our T6 has finally arrived. The first thing we done was to checkout the factory fitted setup,...... Stop/start=check, Regen Braking=check, AGM starter battery=check leisure battery under passenger...
www.t6forum.com
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