Alarms and Security Systems Pretoria Midrand Johannesburg Gauteng

Alarms and Security Since 1992 Business Hours (Std ZA Time GMT +2)
Monday - Thursday 08:30 - 16:30
Fridays 08:00 - 14:00

Closed on weekends and public holidays
223 Tulip Road
Mnandi, Centurion

GPS: S25° 53' 01.0" E28° 04' 26.9"

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Security and CCTV Systems
Tel: 012 668 1184
Cell: 082 456 4700

| Battery | Cable | Relay | Switch | Power Supply | Transformer |

Sealed Lead Acid Battery Handling and Storage

Battery Applications

Sealed lead acid batteries are widely used in UPS, emergency lights, alarm systems, medical equipment, emergency power supplies, electric hand tools, toys, solar systems, etc. These batteries are known to be secure, leak proof, of large capacity and many more advantages.

Battery Storage

  1. The ideal storage condition is at a ventilated dry place at a temperature between 20-25oC.
  2. The self-discharge rate is related to the temperature, the higher the temperature the higher the discharge rate.
  3. Out of service and back-up batteries must be charged on a regular basis to avoid total discharge and sulphating. Badly Sulphated batteries cannot be revived totally and must be replaced, even if never used.
  4. It is recommended to recharge if voltage drop below 12.5V or must be stored for longer than 3 months without charge.
  5. Stored batteries should be recharged uninterruptedly under constant voltage of 14.4-15.0V @0.35A for maximum 18 hours depending on battery Ah and drainage.
  6. Preferably use an intelligent battery saving charger with micro-processor controlled program charging including de-sulphating stages.

Battery Transportation

  1. Keep battery and carton dry and upright.
  2. Avoid any unnecessary shock.
  3. Do not transport or store battery in fully sealed container or room.
  4. Isolate from ground with carton or wood.


  1. Do not use battery in fully sealed rooms or containers.
  2. Recharge battery after discharge as soon as possible.
  3. Do not store battery in flat or semi-charged condition.
  4. Optimum working temperature is between 15-40oC.
  5. Connect equipment terminals tightly to battery.
  6. Keep 15mm minimum between batteries in operation.
  7. Alarm Batteries (7 to 9Ah) in regular use must be charges by constant DC Voltage of 13.8-14.5V @ 0.3-0.4Amp

General Safety tips for Batteries

  1. Take special care when grouping batteries in series not to exceed 96V max.
  2. Install batteries with terminals upwards to avoid leakage.
  3. Do not dismantle or destroy batteries.
  4. Keep batteries away from children to avoid injury.
  5. Do not short circuit battery terminals.
  6. Do not burn or expose any battery to fire.
  7. Bateries contain corrosive material and must be handled with care.
  8. Dispose old batteries according to local regulations.

Security System battery capacity calculation guide

  1. The most accurate method is to add all the Amperes used from all the devices and multiply that with the back-up time required, if not available use the thum-suck method below!
  2. Count how many hard-wired devices are on the system. (Each active beam set count for two units, PIR's, GSM Module, Radio to Control Room, Keypads, wireless receiver, internet module, access control cards running from the system, siren, etc.)
  3. Domestic applications: Multiply that by one. That value is the recommended Amp-hour rating for the system, rounded to closest battery size within ±20%
  4. Commercial Applications: Multiply that by two. That value is the recommended Amp-hour rating for the system, rounded to closest battery size within ±15%
  5. Rural Sites: Multiply that by Three. That value is the recommended Amp-hour rating for the system, rounded to closest battery size within ±10%
  6. Back-up battery packs may be made up by connecting identical batteries of same manufacturer and capacity, from the same batch in parrallel to form a pack. i.e. 4x7.2Ah 12V batteries =28.8Ah pack or 2x 18Ah=36Ah.
  7. The tendancy is to use more 7/7.2Ah batteries in a pack as they are easier to obtain than the other sizes.

Batteries for Solar Systems

Please assure that the battery capacity is more than ample for the power requirement. Work on a minimum 50% residual capacity for the worst case, as batteries cannot be drained flat.