The useful life of the batteries is Patona felt almost as good as the original battery. According to imprint the capacity of 800 mAh is slightly lower than the original battery with 950 mAh.
All the mentioned actions would have been clear to me worth 5 stars. Unfortunately does not work for preventing overheating of Patona batteries. Normally you do not notice this, but should overheat the battery, so the charger can not be detected.
Instructions for performing the temperature tests:
In the original battery is between the T and - contact a thermistor (NTC) installed, its resistance decreases with increasing temperature. In the electrical charging mechanism recognizes a possible overheating of the battery. By measuring this resistance with a multimeter, the resistance at room temperature is about 10 kilohms. Upon heating the batteries for 20 seconds with a hair dryer, the battery is warm and the resistance decreases. Readings original Battery: 11.46 cold, warm 6.6. First Patona battery cold: 10.05, warm 10,04. Second Patona battery coldly 9,97k, 9,97k warm. It was obviously built a cheaper fixed resistor instead of NTC.
Conclusion: Recommended bundle of handy charger and powerful replacement batteries. For security, there is a star deduction, since the temperature sensor, was probably not built for reasons of cost.
