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PRECAUTIONS FOR HANDLING SEALED LEAD-ACID BATTERIES - CONTINUED

3. Preparation Prior to Operation DANGER

(1) Be sure to provide enough insulation around the lead wires and/or plates used between the batteries and the application. Insufficient insulation may cause an electric shock heat generating from a short circuit(or excess current) may result in an injury, burn, smoke or fire.

CAUTION

  • (1)

    Do not plug the batteries directly into the outlet or the cigarette receptacle of a car without inserting a charger between the batteries and the outlet or the receptacle. To do so may cause electrolyte leakage, heat generation, or explosion of the battery.

  • (2)

    Turn off the circuit switch when the connections between the batteries and the charger/load are made.

(3) When using the batteries for the first time, check for rust, heat generation, or -any other abnormalities. If found, do not use as it may cause electrolyte leakage, heat generation, or explosion.

REQUEST

(1) Since the batteries tend to lose a part of their capacity due to self-discharge during shipment and storage, recharge the batteries before you use them after purchase or long-term storage in order to restore their full capacity. Check for the following conditions before to recharge:

Charging method Constant voltage

Constant current

Charging condition (at 25°C )

  • Regulation range of the controlled voltage: 7.25V to 7.45V/6V battery,

    • 14.5

      V to 14.9V/12V battery;

Initial current: 0.1CA to 0.4CA; Maximum charging time: 24 hours.

  • Short-time charge is possible when several batteries of the same model, under the same storage conditions can be charged in series. Otherwise they can be charged separately.

  • Charging current: 0.1CA

  • Charging time (hours) =[Amount of self- discharge (Ah)/0.1CA]120% Rough estimation of amount of self- discharge is as follows (for an example):

When the storage ambient temperature is lower than 25°C, and storage time is known, assume the following amount of self-discharge: [5%/month] storage months Multiply this by the rated capacity (at 20 hour rate) of the battery

  • Regardless of the above calculation, the charge time for a refresh charge must be less than 12 hours.

  • When the storage ambient temperature is higher than 25°C, please consult Panasonic.

4. Unspecified Use CAUTION

(1) Do not place the batteries in an unspecified use or they may leak, generate heat, or explode.

Sealed Lead-Acid Handbook, Page 7

January 2000

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