I have purchased SONIC POWER BOX INVERTER BATTERY (PBX1500) ULTRA LOW MAINTENANCE ON 20 APRIL WITH SU-KAM INVERTER.Its just 11 months, my battery backup reduced to only 4hr. NOW AFTER every 4 hours inverter showing overload then we off the inverter for 5mitns then again start but this is not permanent solloution if if purchased branded battery then why we face any problem. i request you plz send some one to check this and replaced with new one.
rgds
Joginder
Karnal
9355758100
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