Too low capacity. Voltage drops sharply
Battery low
Recharge the battery.
Charging voltage too low
Check voltage regulator, replace if necessary.
Connection terminals loose or oxidized
Clean the terminals and tighten the clamping bolts.
Bad connection on «mass (-) battery-engine-body
Check the connections, lay a new wire if necessary, tighten the bolted connections. Replace rusted bolts with tin-plated bolts.
Excessive battery self-discharge due to electrolyte contamination
Replace battery.
Battery sulfation
Charge the battery with a small current. If the power remains low after charging, replace the battery.
The battery has served its time. The active mass of the plates precipitated.
Replace battery.
Insufficient battery charging while driving
Faulty alternator, voltage regulator or connecting wires
Check alternator and voltage regulator. Repair or replace if necessary.
The ribbed belt is loose. Faulty tensioner
Check tensioner. Replace ribbed belt if necessary.
Too many current consumers connected to the on-board network
Install a larger battery or install a more powerful alternator.
Low electrolyte level*
Overload, evaporation (especially in summer)
Add distilled water to specified level (with a charged battery).
Electrolyte density too low*
Low battery
Charge the battery.
Short circuit in the on-board electrical network
Check the onboard power supply.
The electrolyte density in one cell is significantly lower than in the others*
Short circuit compartment
Replace battery.
The density of the electrolyte in two adjacent compartments is much lower than in the rest
The separating wall of the cell is leaking, which leads to a constant discharge
Replace battery.
* these items refer to conventional batteries.
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