Miller says a new two-ton, R-410A system costs $3,500 to $4,500; whereas replacing just the exterior portion of a R-22 system with a dry charge costs around $2,500, plus the cost of the refrigerant. Miller says he currently charges $50 for the first pound and $30 for each additional pound of coolant.
3) Charge the battery for 4 to 24 hours (depending on the size of the battery, bigger batteries with a larger capacity, e.g. Y50-N18L-A2 or YB16Al-A2, will take much longer to charge than smaller batteries e.g. YB4L-B or YB2.5L-C) with a Motorcycle Battery Charger. 4) After charging, disconnect the battery from the charger and leave to settle for 1 hour. 5) Re check the battery acid level (make sure it is up to the upper level mark) and top up the acid levels if required.
A charger that can charge a standard capacity AAA NiCD battery (180 mAh) in just one hour might take 8 hours to charge a high capacity NiMH (1500 mAh) battery. It's best to ignore such terms and make a rough calculation of how fast a charger can charge batteries.