Thursday, November 4, 2010

Dry Battery Activation (Lead Acid)

Activating a Dry Charged Battery
Special order Rolls Batteries can be shipped dry (acid shipped separately or bought locally). To activate these batteries, start by removing the vent caps. Using approved battery grade electrolyte (1.265), fill each cell half way between the plates and the bottom of the vent well tube. It is important not to over fill the cells as the acid will expand upon charging. If the cells are too full, the acid will spill out of the top of the cells. Allow electrolyte to saturate into the plates and separators for at least 90 minutes. The temperature of the electrolyte will rise and the specific gravity will drop. Once this is complete, place the batteries on charge at the finishing rate (5% of the 8 or 20 hour rate). The rate may be increased if the battery does not begin to gas. Do not let the cell temperature exceed 115F (46C). If the temperature becomes excessive or the cells begin to gas vigorously, reduce the rate of charge. Continue charging until the cell (or cells) reaches within .005 points of the specific gravity of the filling electrolyte corrected for 77F (25C). We recommend to continue charging for an additional 60 minutes to insure no further rise in specific gravity.

Top up or remove electrolyte as necessary for proper level. Never add electrolyte (only approved water) after activation. Replace vent caps and remove any spillage of electrolyte. If necessary, clean with bicarbonate of baking soda and water (100 grams of soda to one litre of water). Rinse with water and wipe dry. Ensure that the soda solution does not get into cells.

** Do not place batteries on charge until electrolyte temperature is below 35C


  1. "If a maintenance-free lead acid battery could discharge and charge with perfect electrochemical efficiency, there would be no emission of hydrogen or oxygen gas, just the quiet conversion of the plate material, one of lead and the other of lead oxide, both to lead sulfate while the sulfuric acid electrolyte changed to water while discharging; and the reversal of this process during charging.

  2. The model of the dry batteries is usually important to many buyers. This is the reason why you may buy a
    battery that can be larger and has a higher reserved capacity rating than the old one that you are