(Continued from Part 1.) Charging Overview At a high level, the stages of charging a battery include: bulk, absorption, and float. On batteries that have been discharged deeply, there is also an equalization charge required. Bulk charging demands high current. Absorption charging requires less current but a slightly elevated voltage. Float is your trickle charge which has low current at about one volt above the stasis voltage of a charged battery. As covered in a recent SurvivalBlog article, the charge levels of flooded batteries can be determined accurately using a hydrometer. Each cell should have an equal level of charge. … The post Weather the Storm with Backup Power – Part 2, by E.R. appeared first on SurvivalBlog.com.