Simple Guidelines when Repairing HP 740715-001 Battery Packs

Only connect cells that are matched in capacity. Do not mix cells of different chemistries.
Never charge or discharge Li-ion batteries unattended without a working protection circuit. Each cell must be monitored individually with a protection circuit.
Include a temperature sensor that disrupts the charge current on high heat.
Apply a slow charge to a repaired pack to bring all cells to parity.
Pay attention when using an unknown brand. Elevated temperature hints to an anomaly.
Li-ion is sensitive to reverse polarization. Observe correct polarity.
Do not charge a Li-ion battery that has physical damage, has bulged or has dwelled at a voltage of less than 1.5V/cell for some time.
Check a repaired pack for self-discharge. Intrinsic defects often have high self-discharge.

Source from http://batteryuniversity.com

HP 740715-001 Battery 

HP 740715-001 Battery 

Brand new HP 740715-001 14.8V 2620mAh laptop batteries

Voltage: 14.8V

Capacity: 2620mAh (41Wh)

Battery cells: 4-cell

Chemical: Li-ion

Battery Color: black

Condition: new original battery

Warranty: 9 months

Product link: http://www.storebattery.co.nz/hp-740715-001-14.8v-2620mah-laptop-battery-store-for-new-zealand-p-126045.html

HP 740715-001 14.8V 2620mAh laptop battery original battery

HP 740715-001 14.8V 2620mAh laptop battery

Original Battery HP 740715-001 Battery Detail：

Price:N$72.35 Save: 29% off (Including taxes)
Voltage: 14.8V
Capacity: 2620mAh (41Wh)
Battery cells: 4-cell
Chemical: Li-ion
Battery Color: black
Condition: new original battery
Warranty: 9 months
Status: In stock
Tested before shipping: Yes

Compatible with following HP laptop model: 
HP 240 G2,HP 240 G3,HP 250 G3,HP 246 G3,HP 256 G3,HP 256 G2,

Compatible with following HP battery model number:
HP OA04, HP 0A04, HP HSTNN-LB5S, HP TPN-F112, HP TPN-F113, HP TPN-F114, HP TPN-F115, HP TPN-C113, HP TPN-C114, HP 740004-421,

Factors Affecting Battery Life

As batteries age they gradually lose their capacity as their function is performed. The constant charge and discharge eventually leads to failure. Components corrode over time, electrical shorts occur and vibration causes damage; all eventually causing failure. Overcharging and undercharging of a battery will also have a bearing on battery life.
Battery Inspection

Check electrolyte level - fluid below the tops of the separators indicates overcharging or poor maintenance. Overcharge condition may be due to incorrect voltage setting, low voltage caused by heat or internal defects, or old age deterioration.

Is there electrolyte on the top of the battery? This can indicate overcharging or overfilling.

Is the battery loose in the carrier? This can cause failure from vibration.

Does the battery have signs of damage or mistreatment? This can also cause failure.
Discharged (flat) Batteries

A flat battery should be checked with a hydrometer. A low Specific Gravity reading of 1.220 or less in all cells indicates a discharged battery and it must be charged before further examination and testing can occur. The discharged condition may be due to a problem in the electrical system (slipping alternator belt, faulty regulator or alternator, high resistance due to corrosion). Internal shorts may also be due to manufacturing defects or shorts through the ageing process or vibration damage.
Early Warning Signs

Batteries often fail when least expected. The usual warning is a slower than normal battery ability to crank the engine. Other less noticeable factors, such as changed driving patterns and colder/hotter weather will all have an effect on the life of a battery. Encourage your customers to ask for a ‘FREE Battery Test’. It’s good public relations and if the battery is near failure, it may avoid the inconvenience of a roadside breakdown.

Original battery HP OA04 14.8V 2620mAh laptop battery

HP OA04 14.8V 2620mAh laptop battery

Original Battery HP OA04 Battery Detail：

Price:N$72.35 (Including taxes, 35% off)
Voltage: 14.8V
Capacity: 2620mAh (41Wh)
Battery cells: 4-cell
Chemical: Li-ion
Battery Color: black
Condition: new original battery
Warranty: 9 months
Status: In stock
Tested before shipping: Yes

Compatible with following HP laptop model:
HP 250 G3, HP 240 G3, HP 256 G3, HP 256 G2, HP 246 G2, HP 240 G2, HP 246 G3,

Compatible with following HP battery model number:
HP HSTNN-LB5S, HP 740715-001,HP 740004-421,  

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