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Maintenance-free Lead Acid battery
Guidelines for maintenance-free Batteries:
1. Battery should operate at temperatures between 15°C ~ 50°C. To ensure a longer life
span, it should be kept between 5°C ~ 35°C. For optimum result, 20°C ~ 25°C will be ideal.
When temperature falls 15 degrees below zero, battery will undergo some changes in its
chemical contents and therefore cannot be recharged. Operating the battery at higher
temperature will result in higher capacity but shorter lifespan, whereas lower temperatures
operation has a longer lifespan but less capacity.
2. If the battery is not recharged 72 hrs after it is completely used, it will be permanently
damaged.
3. When the battery is being charged, the internal gases will be electrolyzed into water
at the negative charge, maintaining the battery’s storage abilities with no water added.
However, erosion at the charged ends of the battery will cause poor performance.
4. The battery’s cycle lifespan (no. of charge and discharge cycle) is determined by the
degree at which power is dissipated., especially the degree of discharged each time it is
used and the recovery charging method. For normal use, the battery can be used for longer
hours when less power is dissipated each time and vice versa. At 25°C, maintenance-free
batteries could be charged 150 ~ 200 times at 100% discharge each time.
5. Decrease in capacity, internal short circuit, deformation in appearance, erosion of
charged ends and decrease in open circuit voltage are symbols indicating battery is
approaching the end of its life cycle.
6. When two batteries are used in parallel connection, the resistance of the cables should
be kept equal.
Properties of the Lead Acid Battery:
1. Has no memory effect. Can be charged at anytime, even when the recharge indication
light is not on.
2. Performance and efficiency are affected by changes in the environment, especially
temperature and humidity. (Best operated between 20°C ~ 25°C)
3. Battery discharge naturally according to a certain pattern even not in use. For best
performance and a prolonged lifespan, it should be recharged every month even when not
in use.
4. Under normal circumstances, battery could last for about a year.
5. When the battery’s life expires, possible indicators include internal short-circuit, decrease
in capacity, deformation in appearance, erosion of charged ends and decrease in operating
voltage.
User’s Precautions:
1. For first-time use, charge the battery for 10 hrs until it is fully charged.
2. To maintain performance and lifespan, if product has not been used for 3 months after
the initial shipment, please fully charge the battery.
3. Before each use, it’s advisable to charge the battery to its full capacity.
4. The average lifespan of the battery is one year. The user is advised to change the
battery after one year of use.
5. The current consumption is in direct ratio with load current. The more current
consumption, the less the operation time.
Summary of Contents for WPSS150M
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