The coolants they use are supposed to last the lifetime of an air conditioner, but accidental damage, wear and tear, contaminants and other issues can spring up. In these cases, the air conditioner may need a charge of coolant after the issues are fixed.
The Fitbit Surge comes equipped with a rechargeable battery made of lithium-polymer. It takes roughly about 1 â 2 hours to charge a Surge fully. Fitbit Surge has the longer battery life of 7 days per charge than other Fitbit products. 1  Plug the cable into the USB hub of your computer.  Then plug the other end into the port at the back of the Surge.
Depending on the deep cycle rate of the battery will depend on how long you will achive a full charge. With the battery that I have, it will take about 24 hours to charge on the 2 amp setting. This is only if I only used about 60% of the capacity. If all the capacity is used and the battery has no life, it will take about 48 hours at the 2 amp rate. I could charge my deep cycle faster on a higher setting but from experience, the higher rate after prolong useage, the life expectancy drops.