| 摘要 |
<p>The present invention discloses a battery tester having high precision, which has a casing 10 having an input device 11 and two detecting wires 12, a microprocessor 20, a variable loading unit 21 and a battery power status detecting unit 22. The microprocessor 20 builds a strategic decision process therein to determine a proper resistance of a load for a battery according to the battery capacity, initial voltage and detection requirements having 1/N CCA and loading time. When the resistance of the load is determined, the microprocessor 20 adjusts a resistance of the variable loading unit 21 equal to the resistance of the load for the battery 30. Therefore, the battery tester does not use the load with the fixed resistance to detect batteries 30 with different capacities and has accurate detecting results.</p> |
