The maintenancefree battery was charged with an adaptive car charger Berezhok V1. The battery test was done with a KONNWEI KW650 car tester. The video was filmed for informational purposes only. I do not urge anyone to charge the battery in this way. Different batteries have different charging modes for both current and voltage. The age of the battery also plays a huge role in the final result. Not all batteries can be charged above 16 volts.

The way to charge the battery was as follows:

1. KONNWEI KW650 battery test
2. Charging the battery in 14.4 V automatic mode before leaving for storage.
3. Battery charging manual mode current 1% of its capacity voltage 14.4 V 8....10 hours at min current.
4. Mixing the electrolyte in manual mode at a maximum voltage of 18.3 V, the current strength is 2 ... 3% of its capacity for 30 ... 40 minutes, we look so that the battery does not heat up above 40 degrees, then it settles to 13.5 V .
5. Charge in 16.1V auto mode before going into storage mode.
6. Battery charging manual mode 13.8 V current 1% of the capacity for three days.
7. Mixing the electrolyte in manual mode 17 V current 2 ... 3% of the battery capacity. We look so that the battery does not heat up above 40 degrees. Charge time 30 ... 60 minutes, then settle for at least 12 hours.
8. Battery charging manual mode 14.4 V current 1% of capacity, charge for three days.
9. Electrolyte mixing in manual mode 17 V current 2...3% of the battery capacity. Don't forget battery temperature. Charging time 30...60 minutes. We are waiting for the voltage to drop below 13.5 volts.
10. Charging the battery, automatic voltage mode is 16.3 volts, until the charger goes into storage mode, then it sucks for at least 12 hours.
11. Battery test.


00:01 Introduction about charger Berezhok V1
01:05 Battery test before charging
01:42 Battery charging automatic mode 14.4 V
02:57 Battery charging manual mode current 1% of its capacity voltage 14.4 V 8....10 hours at min current
03:30 Electrolyte mixing in manual mode at a maximum voltage of 18.3 V current with 2...3% of its capacity 30...40 minutes
05:26 Charging in 16.1V auto mode before going into storage mode
05:57 Battery weighing after charging
06:30 Battery test after charging
07:16 Battery charging manual mode 13.8 V current 1% of capacity for three days
08:51 Electrolyte mixing in manual mode 17 V current 2...3% of battery capacity. Charging time 30...60 minutes
10:26 Battery test after charging
11:05 Battery charging manual mode 14.4 V current 1% of capacity, charge for three days
11:31 Electrolyte mixing in manual mode 17 V current 2...3% of battery capacity. Charging time 30...60 minutes. We are waiting for the voltage to drop below 13.5 volts
12:57 Battery charging, automatic voltage 16.3 volts, before the charger goes into storage mode
14:10 Battery test
15:17 Battery weighing