Handling Precautions And Application Tips


  1. Initial preparation before installation:-
    Verify no abnormalities on battery case (like crack or leakage)
  2. Free air space must be provided between each battery. Recommended minimum space is 5~10mm (0.02~0.04 inches).
  3. Choose a proper mounting place:-
    - Away from heat source (such as a transformer). Otherwise, battery temperature will be raised and shorten battery life.
    Optimal temperature is 27°C .
    - Located in the lowest part of the equipment
    - Away from device that may cause sparks (such as switch or fuse), because battery may generate inflammable gases during overcharge
    - Do not place near open flame
    - PANNA BATTERY is designed to be used in any position, but charging in upside-down position should be avoided.
    Otherwise, leakage of electrolyte from safety vents may occur during excessive charge.
    Do not put batteries into airtight container(s) to release gas generate from excessive charge and avoid explosion.
  4. Provide enough insulation on lead wires which connecting battery and the equipment.
  5. Set the batteries firmly in the equipment. Otherwise, batteries may be damaged, or connection conductivity may be decreased due to shock. When batteries are used in vibration conditions, they shall be mounted in upright position and with proper cushion for protecting vibration.
  6. For applications requiring more than one battery, first make the inter-battery connections properly, then connect the batteries to the charger or the load. Before connection, switch off the circuit of the charger/load. Be careful to connect the positive (+) battery terminal to the (+) pole of the load/charger. Wrong connection will result in explosion, fire and /or damage of the charger/loading equipment and the battery.
  7. Pay attention to the high voltage when a large number of batteries are connected in series. Be sure to wear rubber gloves before installation or maintenance.
  8. If 4 or more battery groups are to be used in parallel connection, consult PANNA  first.
  9. Avoid mixed usage of batteries differing in capacity, manufacturer, storage or charge/discharge conditions. Batteries may be damaged after cycles due to difference in electrical characteristics.


  1. Do not charge batteries under direct sunshine or near heat generator. Otherwise, battery temperature may increase abnormally high and batteries could be overcharged.
  2. Batteries shall be properly charged (to avoid insufficient charge or excess charge) for safety, full battery performance an optimum life. Please refer to the previous section about charging for details.
  3. In cyclic operation, do not continue to charge battery over 24 hours to avoid battery overcharge and deterioration.
  4. When designing the charger, take battery damage modes into consideration, and protection against short-circuits, and / or protection for the charger output.


  1. Do not discharge the batteries below our recommended final discharge voltage (cut-off voltage) shown in previous table to avoid over discharge. Pay attention to design a proper cut-off device.
  2. Battery shall be charged immediately after use, even if damage is cut-off before our recommended cut-off voltage. If batteries are not charged after discharge and then store, it may deteriorate and is becoming more difficult to be recharged, due to the increase in internal resistance.


  1. Store battery in a stable position and store away from conductive material (like metallic or dropping material).
  2. Disconnect the battery from the load/equipment before storage to avoid possible over-discharge or damage. Storage must be take place in a cool dry place to reduce self-discharge and to avoid terminal corrosion.


  1. Batteries will have self-discharge during shipment and storage, therefore refresh charge before putting into service is necessary to recover capacity. Conditions and method of refresh charge are mentioned beforehand.
  2. Refresh charge the battery during storage at least once every 6 months during storage below 27°C .
    Recharge method and time interval as previous table.
  3. For batteries stored for a long time, their capacity may not be fully-recovered. If batteries are stored for say 1-2 years, they may need to be recharged by 12~15 hours more than normal.


  1. Measure the total voltage of the batteries during float charge to see whether there is any abnormal deviation and investigate
    the situation.
  2. When the batteries are connected in series, the batteries in one string shall be exchanged / replaced together.
  3. Replace the battery before shelf life end at various temperatures. Please refer to previous table about shelf life.


  1. Handle the batteries carefully to avoid injuries.
  2. Avoid moisture or rain on the batteries and cartons.
  3. Transport the batteries in the upright position and avoid abnormally strong shock / vibration.
  4. Do not lift a battery by its terminal. Otherwise, internal construction may be damaged and leakage may occur.


  1. Clean battery with wet soft cloth. Never apply oil, polyvinyl chloride or organic solvents (like gasoline and paint thinner) to the battery. Otherwise, battery cover may be cracked / deform and acid leakage will result.
  2. Do not disassemble the battery. Otherwise, sulphuric acid will flow out.
  3. If sulphuric acid deposit on to skin or cloth, wash immediately with water. If splashed into eyes, wash with a large amount of water and consult medical physician immediately.
  4. Avoid dusting by cloth duster or dry cloth (particularly chemical textile), as they will generate static electricity which is dangerous.
  5. Wash your hands after handling battery.
  6. Do not short the battery terminals.
  7. Never dispose battery into fire.

It is the responsibility of each battery user to ensure that their application product is adequately designed, safe and compatible with all conditions encountered during use, and conforms with existing standards and requirements. Like other famous battery manufacturers, technical information in this website is generally descriptive only and is not intended to imply any guarantee or warranty to individual battery