Lead Acid Batteries

Lead acid batteries are the oldest type of rechargeable battery. Despite having a very low energy-to-weight ratio and a low energy-to-volume ratio, they are able to supply high surge currents, meaning that they are able to meet the power requirements of applications such as storage in back-up power supplies in mobile phone towers.

These sealed lead acid batteries have many used in the today's world. They come in a wide range of sizes, typically with voltages of 6V to 12V. Some typical uses are:


  • Emergency Lights
  • Uninterruptible power supplies (UPS)
  • Alarm Systems
  • Communication Systems

GEL Vs AGM Lead Acid Batteries


AGM (Absorbed Glass Mat)


These batteries contain only enough liquid to keep the specially designed glass mat wet. The glass mat is made to wick the battery electrolytes between the battery plates. If the AGM battery is broken no free liquid leaks out.

AGM batteries are preferred when a large amount of amps are required. The life expectancy remains excellent in most cases, if they are not discharged more than 60% between recharges and/or recharged fully every 3-6 months.


Gel Cell Batteries


These batteries contain a silica type gel, which is a thick paste like material. It allows the electrons to flow between plates, but will not leak in a gel battery if the case is broken.

Gel Cell Batteries don't offer the same power capacity as do the same physical size as AGM batteries. Gel cell batteries excel in slow discharge rates and slightly higher operating temperatures and with excellent deep cycle capability. Recharging these batteries must be done correctly or it will suffer a premature failure.


What are lead acid rechargeable batteries used for?


Lead acid batteries are widely used if surge current is critical, even if other designs could provide higher energy densities. Large-format lead acid designs are widely used in settings like hospitals, and in stand-alone power systems. Their surge current properties make them attractive for use in motor vehicles to provide the high current required by starter motors.


How do lead acid batteries work?


The oxygen in the active material (lead dioxide) reacts with the hydrogen ions to form water, and the lead reacts with sulphuric acid to form lead sulphate. The ions moving through the electrolyte then create the current flow.


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Description Price Capacity Nominal Voltage Sub Range Dimensions Terminal Type Construction Designed for Cyclic Application Application Weight Flame Resistant Designed High Rate Application Eurobat Classification Operating Temperature Range Brand Range
RS Stock No. 193-4668
Mfr. Part No.6-CNFJ-24
£124.86
Each
Units
24Ah 12V - - Standard - - - - - - - -40 → +70°C -
RS Stock No. 189-1573
Mfr. Part No.12FGH50
BrandFiamm
£42.25
Each
Units
12Ah 12V FGH 151 x 98 x 100mm - VRLA AGM Yes - 4.2kg Yes Yes 3 to 5 Years Maximum of +25°C -
RS Stock No. 193-4664
Mfr. Part No.6-CNFJ-7.2
£39.98
Each
Units
7.2Ah 12V - - Standard - - - - - - - -40 → +70°C -
RS Stock No. 189-1577
Mfr. Part No.12FGHL48
BrandFiamm
£45.95
Each
Units
12Ah 12V FGHL 151 x 98 x 100mm - VRLA AGM Yes - 4.2kg Yes Yes 10 to 12 Years Maximum of +25°C -
RS Stock No. 193-4670
Mfr. Part No.6-CNFJ-70
£348.58
Each
Units
70Ah 12V - - Standard - - - - - - - -40 → +70°C -
RS Stock No. 189-1575
Mfr. Part No.12FGHL28
BrandFiamm
£25.92
Each
Units
7.2Ah 12V FGHL 151 x 65 x 95mm - VRLA AGM Yes - 2.7kg Yes - 3 to 5 Years Maximum of +25°C -
RS Stock No. 193-4674
Mfr. Part No.6-CNFJ-200
£882.64
Each
Units
200Ah 12V - - Standard - - - - - - - -40 → +70°C -
RS Stock No. 187-5724
Mfr. Part No.Y0.8-12
BrandYucell
£11.99
Each
Units
800mAh 12V - 96 x 62 x 25mm Plug In - - - 340g - - - - -
RS Stock No. 193-4666
Mfr. Part No.6-CNFJ-18
£85.28
Each
Units
18Ah 12V - - Standard - - - - - - - -40 → +70°C -
RS Stock No. 193-4663
Mfr. Part No.3-CNFJ-12
£36.24
Each
Units
12Ah 6V - - Standard - - - - - - - -40 → +70°C -
RS Stock No. 193-4669
Mfr. Part No.6-CNFJ-40
£217.34
Each
Units
40Ah 12V - - Standard - - - - - - - -40 → +70°C -
RS Stock No. 189-1574
Mfr. Part No.12FGH65
BrandFiamm
£63.60
Each
Units
18Ah 12V FGH 181 x 76 x 167mm - VRLA AGM Yes - 6.2kg Yes Yes 3 to 5 Years Maximum of +25°C -
RS Stock No. 193-4665
Mfr. Part No.6-CNFJ-12
£61.26
Each
Units
12Ah 12V - - Standard - - - - - - - -40 → +70°C -
RS Stock No. 193-4662
Mfr. Part No.3-CNFJ-10
£30.96
Each
Units
10Ah 6V - - Standard - - - - - - - -40 → +70°C -
New
RS Stock No. 201-8052
Mfr. Part No.3936
BrandSIP
£109.00
Each
Units
- - - 310 x 470 x 130mm - - - - - - - - - -
RS Stock No. 193-4661
Mfr. Part No.3-CNFJ-7.2
£22.00
Each
Units
7.2Ah 6V - - Standard - - - - - - - -40 → +70°C -
RS Stock No. 193-4660
Mfr. Part No.3-CNFJ-4
£16.40
Each
Units
4Ah 6V - - Standard - - - - - - - -40 → +70°C -
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