TPPL battery claims vs lithium-ion battery claims in marine applications
TPPL batteries require regular extended charges at declining charge acceptance rates to bring the batteries to a full state of charge in order to hold sulfation at bay.
Thin plate pure lead (TPPL) batteries are a variant of absorbed glass mat (AGM) technology. But, whereas AGM batteries (and all other conventional lead-acid batteries) have cast lead plate grids, which conduct current into and out of the battery, and into which the active material of a battery is pasted, the TPPL batteries have plates stamped out of a roll of pure lead.
This design of TPPL batteries has led to some extravagant performance claims. In particular: