Napa Essentials 85-2500 manual Overload Protection, Electrical Condition of Battery

9.5OVERLOAD PROTECTION

The charger uses an output circuit breaker and a thermal breaker to prevent overheating and damage to the charger and the vehicle. If after repeated starting attempts, the charger does not indicate any output on its meter, it may be because one of the two breakers has opened. If the output breaker opens due to excessive current, a popping noise will be heard. It will automatically reset itself in a couple of minutes. If the thermal breaker opens, it will automatically reset itself in about 15 to 30 minutes.

10.ELECTRICAL CONDITION OF BATTERY

10.1The state of charge of refillable-top batteries can be checked by using a hydrometer. A hydrometer is a bulb-type syringe which is used to extract a small quantity of the electrolyte from each battery cell. A float in the hydrometer barrel indicates the specific gravity of the electrolyte. This specific gravity reading indicates the battery’s state of charge at a given temperature, as shown in the table below:

**Initial specific gravity readings vary, depending on battery type and

manufacturer. Contact the seller or manufacturer of the battery for this specification.

10.2The state of charge of sealed-top (maintenance-free and recombination- type) batteries must be checked with a high resolution voltage tester.

10.3If uncertain about type of battery you will be charging, or the correct procedure for checking the battery’s state of charge, contact the seller or manufacturer of the battery.

10.4The temperature of the battery and the equipment the battery is used with has a dramatic effect on battery efficiency and system power requirements. For example, at –18 oC (0 oF) , a battery is operating at 40% of its rated efficiency, while the engine it is attempting to start requires over twice as much power as would be necessary at 27 oC (80 o F).

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