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Some people compared the laptop's battery is the body's blood, although this is not very precise, but the resulting laptop battery can still see the importance of a notebook computer.

I bought second-hand notebook computers have been for some time. When I first started with the laptop battery to the notebook computer power supply to adhere to 50 minutes, then less and less time, to end up working more than 10 minutes of. Although the pairs of second-hand laptop battery is unrealistic to demand too much (as long as several minutes can be used to prevent power failure can be caused by data loss), generally only used as a UPS. But in fact, I always go behind her back, often in some places where there is no power outlet to use her, so always hoped that the battery will work as long as possible, because it can greatly enhance the mobility of notebook computers.

Spent a lot of energy in the market to find, but always first wife did not find the 346970-001 battery. Relied on their own notebook batteries have some understanding, and have a certain appliance repair skills, so try to repair itself. The following operation, the tools needed are: multimeter, soldering iron, tweezers, razor blades, electric pliers, tape, electric wire or a small light bulb.

Capacity Restoration Act

Remove the battery from the notebook computer and found that the battery shell is marked "Ni-Cd", "9.6V 2000mA" the words, indicating that the battery is a nickel-cadmium batteries (rechargeable battery types are the worst kind), rated voltage of 9.6V, capacity 2000mAh. A total of eight battery metal interfaces, respectively, from left to right mark (the battery with the label side facing up): - TTI I + +.

Measured with the multimeter found that the battery has two battery packs, the most left "-" and the right of the second "+" is a group, left the second "-" and the far right of the "+" is a group. Detection of two HSTNN-DB02 battery packs are actually for the no-load voltage of 9.8V, and when the battery is low voltage alarm after the laptop starts out (and one would anticipate that there should not be too much electricity)! So concludes: laptop computer to start low-voltage alarm automatically shut down after some time, but when the battery is not fully discharged, that is, a certain degree of residual power, while the nickel-cadmium batteries have memory effect, and did not fully discharge the charge, the course of time will reduce the battery capacity.

Then sent for two heating wire (which can also change with a small light bulb or power resistor) connected to each laptop battery positive and negative ends (the discharge current can be controlled at 200mA ~ 500mA between the specific capacity of the battery should be considered while set - generally 0.2C ~ 0.5C, that is the battery rated capacity of 0.2 to 0.5 magnification of the current discharge), to release the battery power of basic finished and then it stalls multimeter to 10A current electricity completely exhausted and finally the HSTNN-UB02 battery back into the notebook computer for normal charging. After such repeated four times and found the battery has been able to work more than 40 minutes time, basically to meet the use requirements.

If your laptop battery is also a similar situation, according to the above method a try, maybe there will be an unexpected pick up! In addition, if your laptop uses a lithium battery, laptop battery discharge in a note to be sure to skip the DP390A battery box of the circuit board, because the only way to achieve good results