Osaka 2.4kWh AGM Battery 12V (6-GFM-200)

Note: Sealed AGM VRLA - no topping up, no acid fumes, safe to install indoors, and it can be laid on its side. The trade-off is depth: Osaka publish the cycle life as a curve, not a single number - 1600 cycles at 20% depth of discharge, 1000 at 50%, and only 700 at 80%. The usable figure here is taken at 50%, the middle of that curve and the depth VRLA is normally sized around, which is why a sealed battery of the same nameplate gives you less usable energy than a tubular one. Gas recombination is better than 96%, self-discharge under 3% a month at 25°C. Charge at no more than 0.2 × C10 (0.15 × C10 recommended). Built to IEC 60896-21 and -22, ISO 9001 and ISO 14001. A 10-year float design life against the 6-FMX range's 7 - the longest-lived battery Osaka list, and the reason to pay more for it. Top terminals rather than front access, M8 bolts, 200 Ah at the 10-hour rate. Charging voltages are set with a -3 mV/°C temperature coefficient, so a charger that ignores temperature will overcharge it in a Pakistani summer. Overall height 232 mm with terminals against a 220 mm container. 68 kg - a two-person lift. Osaka's own technical sheet gives 72 kg and slightly different dimensions for this code; the product page figures are used here. Osaka is made by Pakistan Accumulators (Pvt) Limited, part of ACM Group, at Industrial Estate Hattar in Haripur - the same plant that makes Volta, on the same moulds. The Volta equivalent of this battery is a physically identical product in different livery, so compare the two on price and dealer support rather than on specification.