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| Laptopnz.com › Replacement Laptop Batteries › Replacement HP Laptop Batteries › EliteBook 840 Battery |
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Replacement for HP EliteBook 840 Laptop Battery |
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Sale price: GBP £ 16.99
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| Type: |
| Volts: 19V |
| Color: Black |
| Capacity: / 4.74mAh |
| Dimension: 7.4 x 5.0mm |
| Inventory: In Stock |
| Sale Price: GBP £ 16.99 |
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Product Details
- Highest quality HP EliteBook 840 Laptop Battery
- Product Type: Replacement Battery
- Highest quality Japanese battery cells
- 100% original manufacturer compatible
- We will stand behind every purchase with 1-year warranty, PLUS an easy return policy.
- Guaranteed to meet or exceed original specifications
- If you need a part for your model that is not listed above, please email us at order@laptopnz.com.
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Référence équivalente:
Description du produit:
HP
ProBook 4510s, ProBook 4530s, ProBook 6470b,
Elitebook 2540p, Pavilion G50, Probook 440,
Probook 655, ProBook 430, EliteBook 8460p,
EliteBook 2760p, EliteBook 820, Pavilion G70,
Probook 6450b, ProBook 4420s, ProBook 4540s,
ProBook 6560b, Elitebook 2570p, Pavilion G60,
Probook 455, ProBook 4440s, ProBook 6460b,
EliteBook 850, Pavilion G42, Pavilion G72,
Probook 650, ProBook 4525s, ProBook 4730s,
EliteBook 2740p, EliteBook 745, Pavilion G62,
Probook 645, EliteBook 8440p, ProBook 4535s,
ProBook 6475b, Elitebook 2560p, Pavilion G56,
Probook 450, Probook 6550b, ProBook 4430s,
ProBook 6360b, EliteBook 840, Pavilion G32,
Pavilion G71, Probook 6455b, ProBook 4520s,
ProBook 4545s, ProBook 6570b, Elitebook 6930p,
Pavilion G61, Probook 640, |
Choosing the right Charger / AC adapter:Before you buy any AC laptop adapter, please make sure the AC laptop adapter will give you the correct voltage and suitable current output.
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Replacement Laptop Charger / AC Adapter for HP
Voltage: 18.5V (Output), 3.5A(Output Current)
Power: 65W
Connector Size: 7.4*5.0
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Click to Enlarge
Replacement Laptop Charger / AC Adapter for HP
Voltage: 19V (Output), 4.74A(Output Current)
Power: 90W
Connector Size: 7.4*5.0
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Click to Enlarge
Replacement Laptop Charger / AC Adapter for HP
Voltage: 19V(Output), 4.74A(Output Current)
Power: 90W
Connector Size: 4.8*1.7
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Click to Enlarge
Replacement Laptop Charger / AC Adapter for HP
Voltage: 19.5V (Output), 3.33A(Output Current)
Power: 65W
Connector Size: 4.5*3.0
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Click to Enlarge
Replacement Laptop Charger / AC Adapter for HP
Voltage: 19V (Output), 1.58A(Output Current)
Power: 30W
Connector Size: 4.0*1.7
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Click to Enlarge
Replacement Laptop Charger / AC Adapter for HP
Voltage: 18.5V (Output), 3.5A(Output Current)
Power: 65W
Connector Size: 4.8*1.7
|
Click to Enlarge
Replacement Laptop Charger / AC Adapter for HP
Voltage: 19.5V (Output), 4.62A(Output Current)
Power: 90W
Connector Size: 4.5*3.0
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Click to Enlarge
Replacement Laptop Charger / AC Adapter for HP
Voltage: 19.5V (Output), 3.33A(Output Current)
Power: 65W
Connector Size: 4.8*1.7
|
Click to Enlarge
Replacement Laptop Charger / AC Adapter for HP
Voltage: 19.5V (Output, 2.05A(Output Current)
Power: 40W
Connector Size: 4.0*1.7
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Tips for Extending Battery Life
Cycle you battery
If you have a laptop with either NiCD or NiMH batteries fitted, allow them to go completely flat before recharging them. If you are going to use your laptop for extended periods of time on mains power remove your battery altogether and store it in a discharged state. Li-ion batteries are usually unaffected but we have seen that if you leave your laptop on mains power without cycling them then their useful life time is reduced substantially.
Screen
Turn the brightness and contrast-control down as far as you can stand it.
Turn off and/or Remove unneeded components
Turn off internal/external modems when not in use. Leaving your PC card modem plugged in can reduce your effective battery time by up to 25%. Remove PCMCIA cards when not in use.
Turn off AutoSave
This is somewhat risky, but if you’re careful to monitor your battery’s power level, you can avoid unnecessary disk accesses.
Disable helpers, wizards & other automatic features
Software functions that automatically format text, check spelling, and recalculate your spreadsheet all draw down power.
Use a disk-caching utility
Install a utility program like Norton Utilities or SmartDrive to cut down on disk-accessing time. The cache saves the most-often used or most recently used information to a special virtual memory cache. Then, instead of battery-depleting hard-drive accesses, the computer uses the information in the cache instead.
Clean Leads
Once a month, clean the leads (silver or gold metal strips on end of battery) with rubbing alcohol to ensure that your battery is making a good clean contact with the leads in your system. |
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