HOW TO PERFORM FLUSH by @talhawaleed
link: https://www.pakwheels.com/forums/electrical-wiring-battery-lights/153379-maintaining-ups-car-batteries#post2525873
Note: You can aslo find this topic at top of this page in post "Maintaining UPS/car batteries" by @talhawaleed. You got to read all three sub topics before performing flush.
WRONG FLUSH PROCEDURE AND PRACTICES
You may perform flush
MAIN REASON, LIGHT FLUSH IS PERFORMED.
Procedure which I follow is that I fully charge my batteries, then take the batteries outside, drained the electrolyte in proper sewerage line while I already have an access to new electrolyte which was prepared earlier before performing this procedure and have the batteries flushed it with tap water 5-6 times. Later put the battery in upside down position for 30 minutes before pouring new electrolyte back in.
Question For Expert: Where did you get the idea that battery need to be fully charged 100% by a dedicated battery charger guy? Full charging by UPS will be enough and necessary. But still I like to have expert opinion on that.
Next Step: Perform Flush as instructed
Fill up with Pyrochem, only fill till upper level indicated at side of battery. Electrolyte should always remain 1/8 inch lower than bottom vent well.
Connect battery with ups. Ups will recharge it.
check battery health via hydrometer after 2 weeks
Note: It's better that you check 3 variables of ups as well. Charging rate, battery high cutand battery low cut. If these are properly set and you perform the flush procedure right. Then battery will give best back time as per its health.
Regarding bring back life of cell, this procedure will do maximum good but can't bring to 100% life.
AGS battery tonic, if it's distilled and deionized water then use it for topping.
Questions for Experts:
1. Before flush do batteries need to be charged 100% by a dedicated battery charger guy?
2. How you rate AGS battery tonic in terms of quality for use of topping up battery when electrolyte level went down.
Thanks
Best Joy