The SLA (Sealed Lead Acid) battery has stable and reliable performance. Utilising the latest technology the battery can withstand overcharging, over discharging, vibration, shock and is capable of extended storage.
Features
Long service life
Sealed construction
Suitable for float or cyclic use
Heavy duty Lead Calcium grids
Automatic low pressure venting system
Low self discharge
Applications
Alarm systems, Models & toys, Control equipment, Marine equipment, Computers,
Portable cine & video lights, Medical equipment, Cable television, Power tools,
Telecommunication systems, Fire alarms, Emergency Lighting, Golf carts, Racing cars, Solar
powered systems.
Sealed construction
The unique construction and sealing techniques ensure that no electrolyte leakage can
occur from the terminals or case. This feature insures safe efficient operation of the
batteries in any orientation (excluding continuous use inverted). SLA batteries are
classified as 'non-spillable' and will meet all requirements of the International Air
Transport Association.
Low pressure venting system
SLA batteries are equipped with a safe low pressure venting system, which operates at lpsi
to 6psi designed to release excess gas and reseal automatically in the event that gas
pressure rises above the normal rate. This low pressure system coupled with the
extraordinarily high recombination efficiency make the batteries the safest sealed
lead-acid batteries available.
Heavy duty lead Calcium grids
The heavy duty lead Calcium grids in SLA batteries provide an extra margin of
performance and service life in both float and cyclic applications, even in conditions of
deep discharge.
Terminals
Excellent terminal sealing construction has been achieved by using long mechanical
sealing paths and the selection of small shrinkage ratios for the sealing materials.
Float service life
The float service life under normal conditions is expected to be 5 years. The service
life will be affected by the battery operating temperature and the method of charging
utilised.
Cycle service life
The actual service life of a battery in cycle service will vary with the average depth
of discharge. The deeper the average discharge on each cycle the shorter the battery life.
As an example 50% average discharge will give around 500 cycles. 30% average discharge
will give in excess of 1000 cycles
Long shelf life
It is recognised that SLA batteries have an extremely low self discharge rate,
typically less than 3% per month at 25c. This allows batteries to be stored for up to one
year at 25c. without the need for a top up charge.
Maintenance free operation
During the expected service life of the batteries there is no need to check specific
gravity or add water In fact, there is no provision for these maintenance functions.
Charging instructions
1. Always recharge battery immediately after use.
2. Constant voltage charging is recommended. At 25c. 2.27-2.30vpc for float use and
2.40-2.45vpc: for cycle use.
3. The maximum initial charging current should be 0.4C.
4. If batteries are used in series or parallel, the correct size cabling should be used.
5. Do not charge the battery in an upside down position.
6. The battery requires approximately 110% of the total discharge energy to fully charge.
Storage charging intervals
Storage Temp. Charging intervals
20c or less Every 9 months
20-30c Every 6 months
30-40c Every 3 months
Discharging instructions
1. Never leave a battery in a discharged condition.
2. In cycle service it will take 3-5 cycles for a new battery to reach full capacity.
3. In float service it will take approximately one month from installation and recharging
to reach full capacity.
4. Maximum continuous discharge current is 50C.
5. Avoid over discharging the battery.
Storage
1. When storing the batteries, be sure to remove them from the equipment, or
disconnect them from the charger and load.
2. Stored batteries should receive a supplementary charge at the intervals suggested.
3. The batteries gradually deteriorate even during storage.
4. Do not store batteries in sealed containers.
Constant voltage charging (Float)
Float service: 2.27-2.30vpc. At 25c It is suggested that the initial current be set within
0.2c. The graph shows time taken to recharge battery from fully discharged state.
Cycle service life
Cycle service life depends on the operating temperature of the battery, the method of
charging and most importantly the depth of discharge of each cycle.
Constant voltage charging (Cycle)
Cycle service: 2.40-2.45vpc at 25c It is suggested that the initial current be set
within 0.2c. The graph shows time taken to recharge battery from fully discharged state.
Self discharge characteristics
All SLA batteries self discharge. The self discharge rate is affected by storage
conditions and particularly temperature (see graph). Ideally batteries should be stored in
a cool dry place without direct sunlight.
Battery discharge characteristics
The battery discharge capacity of a lead acid battery varies with discharge current.
SLA (Sealed Lead Acid) batteries are rated at the 20 hour rate. The capacity of the
battery at 20 hours discharged to an end voltage of 1.75vpc. at a temperature of 25c. The
graph shows the characteristic discharge curves for SLA batteries.
Effect of temperature on charging voltage
The graph shows the relationship between temperature and charging voltages in cyclic
and standby applications.
Stable quality and high reliability
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All prices are in UK pounds and include VAT @ 17.5%
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