preface
I don't know if you have used some lamps and lanterns that use removable lithium batteries, small household appliances, if it is a columnar lithium battery, the general specifications are 18650 and 21700, such as the battery cell used by Tesla is 21700 specifications. Everyone may be confused, what is this specification? Where 21 indicates the diameter of the cylinder is 21mm, 70 is the height of the cylinder 70mm, and 0 is the shape of the battery cell.
If you've ever bought a similar battery, you know that, like common NiMH rechargeable batteries, charging these lithium batteries requires a battery charger, which is quite inconvenient. The recent Netkol NL2150HPR lithium battery received by the charging head network solves this problem very well.
Unbox
The Netker NL2150 series lithium battery size specification is 21700, and both models have a built-in 5000mAh super capacity.
The packaging of both batteries adopts a plastic and easy-to-open design, which is convenient for users to open the packaging without the help of other tools.
The shape of the two lithium batteries of the NL2150 and NL2150HPR is the same, but the HPR model adds a USB-C interface and supports direct charging, which greatly facilitates daily use.
With a battery capacity of 5000mAh and supporting a maximum current output of 15A, it seems that high-power flashlights and power tools with it are not without reason.
The negative is embossed with the words NITECORE.
The positive electrode inevitably generates a lot of heat at high current output, and is also marked here to remind the user.
The USB-C interface is the exclusive moment of hpr models, this lithium battery supports USB-C interface charging, charging box direct charging two charging methods.
The USB-C interface does not see too many clues, and the charging power is shown below.
The length of the Knight Cole NL2150 series lithium battery is about 77.12mm (the terminals are insulated, and normal use should never be short-circuited).
The diameter is approximately 21.35mm.
The weight is approximately 73.6g.
Compared with the ordinary AA battery, the size is compared.
And 18650 compared to the size.
Compared with the size of the conventional 21700 battery, the 7mm just grown is the circuit board.
And 26650 compared to the size.
Voltage and internal resistance
The voltage measured by the multimeter when the battery is fully charged is about 4.193V.
The internal resistance of the battery tested with EB is 30mR at an operating current of 1A.
The internal resistance at 2.5A is 32.4mR.
The internal resistance at 5A is 32.4mR.
Charging test
USB-C charging test compatibility test
The Netker NL2150HPR lithium battery is charged here using a charger with an input power of approximately 5.08V 1.05A 5.37W.
There is an LED charging indicator at the positive and negative poles, charging red lights, full of green lights, or very intuitive.
The Flash Pole 100W 3C1A Gallium Nitride charger charges it at approximately 5.07V 1.05A 5.34W.
It is charged by a flash pole 100W Gallium Nitride charger with a power of approximately 5.05V 1.05A 5.32W.
It seems that the Knight Cole NL2150HPR lithium battery is charged through the USB-C interface, and the maximum input power is about 5W. The USB-C interface of the charger is also used here to charge the lithium battery, and the charging is not recognized.
USB-C Charging Test 0-100%
A charger is used here to charge the battery via the USB-C interface. In the first 3 hours and 28 minutes, the charging power is about 5W, and then it enters the trickle charging, which takes 5 hours and 25 minutes.
The charging data is plotted as a graph, the first 2 hours, the recharge is about 44%; the first 3 hours and 59 minutes, the charge is about 86%; the whole process takes about 5 hours and 24 minutes.
Discharge test
Connect the battery to the device and measure the discharge curve and actual capacity of the battery. The starting voltage of the battery is about 4.192V, the termination voltage is about 2.6V, the whole current is maintained at 1A, and the actual discharge capacity is about 4944mAh.
The starting voltage of the battery is about 4.2V, the termination voltage is about 2.6V, the whole current is maintained at 2.5A, and the actual discharge capacity is about 4851mAh.
The starting voltage of the battery is about 4.191V, the termination voltage is about 2.6V, the whole current is maintained at 5A, and the actual discharge capacity is about 4865mAh.
Charging head net summary
Netker NL2150 series lithium batteries for different users, the introduction of ordinary and USB-C charging models, two kinds of 21700 specifications of lithium batteries, for high-power flashlights, power tools, small household appliances and other products. Both lithium batteries have a built-in large capacity of 5000mAh, supporting a maximum output current of 15A, and powerful power.
The USB-C model supports 5W of direct charging power, which is quite convenient for external charging. By allowing the battery to support USB-C interface charging, various tools in disguise support USB-C charging, and only a regular charging head is required for external battery life. Of course, it also supports adapter charging, which provides convenience for professional users to charge several batteries at the same time.