I have 6 or so Sears 2 Amp units, just bought another yesterday. They auto-select between 6 and 12 Volts.
They've worked well for me.
Also, I try to remember to disconnect the batteries on anything that sits unused for over a few days or weeks, have a number of them set up with battery disconnect switch, making that easy.
You would find it surprising how much that helps, even without a battery maintainer they typically hold charge a lot better and last a LOT longer.
Almost everything has a least a little electrical leakage to ground, whether it be a newer vehicle with computers that "sleep" but don't shut off completely, or simply have an alternator, or even some (possibly hidden) dirty/rusted/corroded electrical components.
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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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1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
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