Well Andy makes a point. Heat is what kills you and 2 amps on a couple of hours is 4 amp hours. So what if the circuitry allows the current to double due to the half voltage charging resistance. Ok so it's 8 amp hours, big deal. Obviously the size of the battery matters. For a size 24 or larger I wouldn't give it a second thought.
Lest we remember that a given engine requires so many hp to spin it up. Back in the day, the HP (746 watts....dc volt-amps/HP) was produced by 6 volt batteries using twice the current of today's 12v batteries. So what if the current doubles from the 2A setting on the charger.
I have a couple of size 27 6 volt batteries out back. I'd have to partial charge them before I did the test. I think I still have a 2/10 amp 12v charger on the shelf. Might take that on tomorrow and check the charging current between one and 2 across 12 v.
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Today's Featured Article - History of the Nuffield Tractor: Part 2 - by Anthony West. In February 1953 production of the ETC T.V.O engine started, ready for the March 1953 press announcements. The new TVO engine had a number of improvements which resulted in a 10 per cent more power (43bhp as against 38 bhp on the earlier engine) and 10 per cent more fuel economy. Some of the improvements are listed below: Redesigned combustion chamber, improved spark plugs and positioning, plug size 14mm(earlier size 18mm).
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