A valve-regulated lead-acid battery (VRLA battery) sometimes called sealed lead-acid (SLA) or maintenance free battery.

There are three primary types of VRLA batteries, sealed VR wet cell, absorbent glass mat (AGM) and GEL cell. Gel cells add silica dust to the electrolyte, forming a thick putty-like GEL. These are sometimes referred to as "silicone batteries". AGM (absorbent glass mat) batteries feature fiberglass mesh between the battery plates which serves to contain the electrolyte. Both designs offer advantages and disadvantages compared to conventional batteries and sealed VR wet cells, as well as each other.

Due to their construction, the GEL cell and AGM types of VRLA can be mounted in any orientation, and do not require maintenance, which is called "Maintenance Free".  They are widely used in large portable electrical devices, off-grid power systems, hybrid storage systems, and similar roles.



Key Features :
♦Rechargeable 12V 250ah Gel Deep Cycle Battery
♦Gelled electrolyte made by mixing sulfuric acid with silica fume
♦The electrolyte is gel like ,immobile and does not leak ,enabling uniform reaction of each part of the plate .
♦High rate discharge performance due to tight assembly technology
♦Strong heat dissipation and wide operating temperature range 
♦Avoid acid mist being separated out , environment friendliness
♦Efficient venting system release excessive gas automatically

1, Function Parameter		5, Environment Temperature
Norminal Voltage	12V	Discharge Temperature	-20-60ºC
Norminal Capacity(10 hours rate)	250Ah	Charge Temperature	-10-50ºC
Numbers of Cells	6cell	Storage Temperature	-20-60ºC
2, Rated Capacity at 25ºC(77ºF)		6, Inner Resistance & Max. Discharge Current
10hr,10.8V/cell,20ºC/68ºF	250Ah	Fully Charge Battery at 25ºC(77ºF)	2mΩ
3hr,10.8V/cell,20ºC/68ºF	191.7Ah	Max. Discharge Current	3750A(5s)
1hr,10.5V/cell,20ºC/68ºF	138.1Ah	Short Circuit Current	12500A
3, Capacity affected by Temperature(10 hour rate)		7, Self-discharge@25ºC(77ºF)
40ºC(104ºF)	103%	Capacity after 3 Month Storage	91%
25ºC(77ºF)	100%	Capacity after 6 Month Storage	82%
0ºC(32ºF)	85%	Capacity after 9 Month Storage	73%
-15ºC(5ºF)	65%	Capacity after 12 Month Storage	64%
4, Constant Voltage Charging at 25ºC(77ºF)		8, Dimension & Weight
Cycle Charge	14.4V~14.9V	Length	520mm
Maximum Charging Current	62.5A	Width	269mm
Temperature Compensation	-30mV/ºC	Height	220mm
Float Charge	13.6-13.8V	Total Height	228mm
Temperature Compensation	-20mV/ºC	Reference Weight	70kgs

Applications :
♦Solar and wind energy storage system 
♦EPS and UPS battery backup
♦Signal system , emergency lighting system , security system
♦Telecommunication Equipment 
♦Power plant and transmission system

Internal Structure of Lead-Acid Battery

♦ Our battery factory Founded in 2008 , 2 million batteries annual production capacity 
♦ Products including valve regulated lead acid battery , Gel battery , deep cycle battery, OPzV
   and OPzS battery 
♦ Products are exported to more than 100 countries 
♦ Products are certified by CE , UL ,Rohs 
♦ Mature and very well respected AGM and GEL technologies for valve-regulated lead-acid
   batteries ranging from 2Ah to 3000Ah
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Gina Ji(Sales Manager) Tel: 0086 182 9796 8518