Welcome to a laptop battery specialist of the dell laptop battery
However, if the device's force (voltage) required was 5 volts, and the electrical flow (amps) was 1 amp, and multiplying them makes 5 watts, the device -- like a smartphone -- would charge. The solar panel specifications would be adequate.
Budget vs. Weight Issues
The Li-Po battery such as Dell Inspiron E1405 Battery , Dell TC023 Battery , Dell XPS M140 Battery , Dell PP19L Battery , dell Inspiron E1705 battery , dell Inspiron 6000 battery (dell 6000 battery ), dell Inspiron 9300 battery , dell Inspiron 9400 battery , dell 310-6321 battery pack from the earlier example, including its 5-volt and 19-volt ports, weighs in at 8 oz. and is 7 x 3 x 1 inches. The Lead Acid battery from the earlier step, on the other hand, weighs 13 lbs. and has dimensions of about 7 x 6.5 x 3 inches.
The Lead Acid battery costs $30 and the Li-Po comes in at $150.
Step 4: Other Considerations
Read the labeling on the battery pack you're buying. If the Dell laptop power supply requires 19.5 volts and 3.34 amps, make sure the output capacity of the battery pack port is sufficient.
Look for "Output 19.5v, 3500 mAh" or similar on the new battery pack. Again, work off the existing power supply here, not the existing battery. In this example, the output is sufficient.
Step 5: Become a Battery Geek
Buy a LiPo battery "pack" -- that's a configured set of batteries complete with case and ports -- rather than a bunch of individual 3.7-volt Li-Po battery cells unless you want to become a battery geek.
There are proper charge rates and maximum safe discharge rates that you need to know about if you go the do-it-yourself route -- you can cause explosions.
The best sources of information on this subject, if you want to explore it, are those related to model airplanes. Model aircraft hobbyists have had battery weight and size issues for a lot longer than us gadget users, and have been early adopters of lithium polymer.
Warning: Never mix types or batches of lithium battery. It's unsafe.
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