We provide 3 ~ 5 years different warranty.

7-15 working days for bulk order after your deposit is confirmed.

Yes, OEM is accepted.

Our energy storage battery is at 10HR. Compared with battery at 20HR, the capacity of our battery is higher. For example, our 6-CNJ-200 is 200Ah at 10HR discharge, the battery at 20HR discharge condition, the capacity is about 210Ah. On the contrary, if a battery is 200Ah at 20HR, when it is discharged at 10HR, the capacity is less than 200Ah （About 190Ah, or more less)

CE, UL, ROHS, IEC61427, IEC60896

Battery self-discharge <3%/month@25℃(77℉), can be stored up to 6 months at 25℃(77℉) and then a freshening charge is required. If the storage temperature higher than 25℃(77℉), a freshening recharge will be required sooner.

Single battery will be packed in carton box, and boxes in poly-wood case.

All of our batteries owe Certification for Transport of Chemical Goods by Air and Sea, which are certificated by SICIT with CNAS. China Customs strengthens management of illegal traffic.

If there is problem happened , we will gather all data, picture and video, and according to your using condition to find out what cause this problem. If it is quality problem, we will replace you the new one with your next shipment.

Valve Regulated Sealed lead acid battery life is determined by many factors, including temperature, stock time, depth and rate of discharge, and the number of charges and discharges(called cycles).

Over-discharging is a problem which originates from insufficient battery capacity causing the batteries to be overworked. Discharges deeper than 50% significantly shorten the Cycle Life of a battery without increasing the usable depth of cycle. Infrequent or inadequate recharging can also cause over discharging symptoms called SULFATION. Despite that charging equipment is regulating back properly, over discharging symptoms are displayed as loss of battery capacity and lower than normal specific gravity. Sulfate occurs when sulfur from the electrolyte combines with the lead on the plates and forms lead-sulfate. Once this condition becomes occurs, marine battery chargers will not remove the hardened sulfate. Sulfate can usually be removed by a proper desulfation or equalization charge with external manual battery chargers. To accomplish this task, the flooded plate batteries must be charged at 6 to 10 amps. at 2.4 to 2.5 volts per cell until all cells are gassing freely and their specific gravity returns to their full charge concentration. Sealed AGM batteries should be brought to 2.35 volts per cell and then discharged to 1.75 volts per cell and then this process must be repeated until the capacity returns to the battery. Gel batteries may not recover. In most cases, the battery may be returned to complete its service life.

Though there is a strict battery selection procedure, after a certain period usage, the non-homogeneity will appear more and more obviously. Meanwhile, charging equipment can’t choose and recognize the weak battery out, so it is user who can take control of how to keep the equilibrium of battery capacity. User would better test the OCV of every battery regularly or irregularly in the middle and later period of battery pack usage and recharge the battery of lower voltage separately, in order to make the voltage and capacity as the same as other batteries, that decrease the difference between the batteries.