External Laptop Battery Charger for Dell Inspiron 15R-N5537 17 17-3721 17R 5721 17R 17R-573

New External Laptop Battery Charger
Charges Laptop Batteries' part numbers: Dell MR90Y
(Remarks: This charger doesn't charge the battery model: dell M5Y1K.)
Charges Batteries for following Laptops: Dell Inspiron 15R-N5537 17 Series 17-3721 17R 5721 17R Series 17R-5737 17R-N3721 17R-N3737 17R-N5721 17R-N5737

Functions:
1. You can charge your orignal battery or spare one with this charger directly. Do not need the AC adapter.
2. Read battery information from the battery protective plate and then regulate the output voltage and current.
3. With five LEDs, four green for charging status and one red for power indicating.
4. Intelligent protection against over-current, over-voltage, over-charge, over-heat and short circuit.
5. With the repair zero-voltage-battery function.
6. Simplify charging process, save your time and keep your laptop in good condition, especially if you own two batteries or more.
(BATTERY IS NOT INCLUDED)
Warranty: Full 1 year.
Charging Instruction:
Normal Working condtion:
Four green charging lights and the power light go on after switching on. The charger reads the battery information
from the battery protective plate, and then starts charging. If the battery comes with SMBUS, the four LED's will show
the capacity status.
Charger green LED status shows Capacity Percentage is as follows:
All the four LEDs blink circularly: < 25% Capacity Percentage.
LED1 is on, the other three LEDs blink circularly: < 50%
Both LED1 and LED2 are on, Both LED3 and LED4 blink circularly: < 75%
LED4 blinks. The other three LEDs are on: < 100%
All the four LEDs are on. = 100%