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Step 5Rating and comments
Please rate this instructable and leave me comments / suggestions .
I would be very happy to hear if anyone else built it .
Another warning posted by one of my readers :
======================================
Before you go home and crack those old laptop batteries open listen up for your own safety - I test these for a living. Lithium Ion Batteries can be really dangerous. Be EXTRA Careful when working with Lithium Ion Batteries.
Traditional Lithium Ion Batteries contain Cobalt Oxide - which is very flammable - enough to really ruin your day. All Lithium Ion Batteries can produce Hydrofluoric acid when the electrolyte is mixed with water in the right proportions. Hydrofluoric Acid will liquefy your bones, and kill you. It is not treatable.
NEVER put more volts into a battery than the nominal rating. Charging a lithium ion battery with more voltage is not going to make the battery charge faster, it is going to make the battery blow up, venting electrolyte gas at the very least.
To make a battery charge faster - supply more current. If your battery says "3.3V 1.3Ah" this means that the battery can supply 1.3A for 1 hour. When charging the battery, supply 3.3V 1.3A - this will cause the battery to fully charge in 1 hour. 3.3V 3.9A (3C rate) will cause the battery to charge in 1/3 of 1 hour. There is a limit to how much current you can charge with. Refer to lierature from the Manufacture of the battery cell for charge/discharge. Do not exceed the manufacturers specifications.
It is not a good idea to solder to the cell.
I would be very happy to hear if anyone else built it .
Another warning posted by one of my readers :
======================================
Before you go home and crack those old laptop batteries open listen up for your own safety - I test these for a living. Lithium Ion Batteries can be really dangerous. Be EXTRA Careful when working with Lithium Ion Batteries.
Traditional Lithium Ion Batteries contain Cobalt Oxide - which is very flammable - enough to really ruin your day. All Lithium Ion Batteries can produce Hydrofluoric acid when the electrolyte is mixed with water in the right proportions. Hydrofluoric Acid will liquefy your bones, and kill you. It is not treatable.
NEVER put more volts into a battery than the nominal rating. Charging a lithium ion battery with more voltage is not going to make the battery charge faster, it is going to make the battery blow up, venting electrolyte gas at the very least.
To make a battery charge faster - supply more current. If your battery says "3.3V 1.3Ah" this means that the battery can supply 1.3A for 1 hour. When charging the battery, supply 3.3V 1.3A - this will cause the battery to fully charge in 1 hour. 3.3V 3.9A (3C rate) will cause the battery to charge in 1/3 of 1 hour. There is a limit to how much current you can charge with. Refer to lierature from the Manufacture of the battery cell for charge/discharge. Do not exceed the manufacturers specifications.
It is not a good idea to solder to the cell.
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