quick shipping, We will see how it works
The goods arrived OK into my hands. Thank you! The batteries look good! I will now test them for more details on their properties (I'm a technician, it interesting me).
Tested 10pcs and no great glory! 2 cells in series, expect 8.4V max and 600 mAh. The published capacity is usually greater than it actually is (experience). Measuring conditions: tester ZB2L3, resistance 40 ohms (approx. 200mA), switch down voltage 6V (recommended), but from 7V the voltage drops sharply downwards. 6 batteries fit in the range of 500 - 530 mAh. 4 batteries were in the range of 220 - 280 mAh. Experience - a manufacturing error where the batteries are not mounted at the same charge level (necessary for serial connection). I opened these batteries and balanced the cells with each other. Contacts from left: + Bat, + Out, center Bat, -Out, -Bat). I held a voltmeter with 12V 5W bulbs connected in parallel (2x - approx. 400 mA load) on a more charged cell until the voltage of both cells equalized. Then I also got over 500 mAh! I'm a technician and I can balance the battery (DIY). For a layman, such goods are worthless!