If you have a situation where your travel time exceeds the battery backup of your phone, then you might be a person who often ends up with a dead phone 
and lots of problems unless you have a standby phone. So well guess what, lets try something to charge your phone on the go at the least expense using a portable rechargeable battery kit. This particular tutorial is for Nokia mini pin charger phones. You can make a charger for any phone if you can get the pin from any source like a local charger or converter cable like the one used below.
and lots of problems unless you have a standby phone. So well guess what, lets try something to charge your phone on the go at the least expense using a portable rechargeable battery kit. This particular tutorial is for Nokia mini pin charger phones. You can make a charger for any phone if you can get the pin from any source like a local charger or converter cable like the one used below....
Thought of using a standby Nokia battery, but my 5800's battery costs around 800RS and will only give me the same amount of charge I'm getting now and that too just once more. It was not worth the money, plus I have to switch off my phone to switch batteries which I dont like at all. The next option of using ordinary china Li-ion cells but charging Li-ion's from an external source is too risky, so here comes our good old Ni-cd battery back.
The built in battery of 5800 is around 1350mA and this setup will give it a near full second battery life. If you need more, use NiMH batteries like of 2500mA which will give 3 times the original life, say 3-4 days with full GPS, wifi and Internet. But dont expect to get more than 3 days as these batteries are deep cycle batteries and are not designed to store charge for more than 3-4 days, but sometimes you'll get with good batteries upto a week. Any ordinary phone will give around 2 charges as they have a smaller battery than the one I have.
The built in battery of 5800 is around 1350mA and this setup will give it a near full second battery life. If you need more, use NiMH batteries like of 2500mA which will give 3 times the original life, say 3-4 days with full GPS, wifi and Internet. But dont expect to get more than 3 days as these batteries are deep cycle batteries and are not designed to store charge for more than 3-4 days, but sometimes you'll get with good batteries upto a week. Any ordinary phone will give around 2 charges as they have a smaller battery than the one I have.
I used 4 x 1.2V 850mA NiCd AA rechargable batteries to get a peak of around 6v and minimum 5v. Since these batteries are completely safe to charge off an adapter, anyone can use them without much knowledge. The best part is that one battery costs only 30Rs, and the whole kit cost me only about 130Rs to setup leaving me space for an upgrade to even 2800mA batteries if I wish to. Also I can use the same batteries for other purposes like a camera or remote controls without a seperate charger.
Items Required
1. 4 x 1.2V Rechargeable AA batteries with 700-2800mA current (NiCd/NiMH)
2. 4 Battery holder with connecting wires
3. 1 or 2 feet wire pair preferably black in colour
4. Nokia Old charger to New pin converter wire, not connector
5. Wire Sleeves and Heat shrinking tubes
6. Blade or sharp splicing instrument
7. Insulation tape
2. 4 Battery holder with connecting wires
3. 1 or 2 feet wire pair preferably black in colour
4. Nokia Old charger to New pin converter wire, not connector
5. Wire Sleeves and Heat shrinking tubes
6. Blade or sharp splicing instrument
7. Insulation tape
Connecting wire.
Sleeve for wire.
First get the charger pin converter wire which you get for about 5Rs at any local mobile dealer and cut it at the middle. The one problem we are going to face here is that this converter will be having the old nokia charger connecter on one end. So if you dont have an old nokia charger, you will also have to buy a socket that matches ur new charger from an electronics shop and use that instead. You will have to show your new charger pin to the dealer and ask him for the socket matching it. It will be abit hard to get. Here I'll be explaining using the old charger because its easier to get from the cable we are cutting.
Now Splice the cut wires on both ends to get the copper conductors of the red and black wires.
Splice the 2 feet wire on one end and connect it to the Charger pin we got by matching colours. polarity is very important here. If you mess up the connections, you are messing up your phone.
Put a sleeve over one of the wires and connect the next one such that they do not touch each other. You may also use insulating tape.
Now Put two pieces of the heat shrinking tube on for both the ends but dont do anything now.
Splice the other end and connect it to the socket as well as the battery pack taking care for the polarity.
Again add a sleeve or insulation tape.
Connect the connect to battery case and put in the 4 batteries.
If possible check with a multimeter that you get around ~6V at the pin.
If all is well and confirmed to be ok, try connecting to your phone and check if its charging. If not, check all connections.
If everything is ok, heatshrink the tubes by heating it so that the joints are consealed and wont get loose.
Charge the batteries for 15-20Hrs on first use. NiMH batteries might need 23hr charge. Since the batteries are charged using a very high current, they'll charge quickly. For the same reason, never charge them overnight or unattended. They dont have any cut off circuit to cut the power when full like the phone. Over charging will reduce battery life drastically. Always keep them charged even if not in use.
If all is well and confirmed to be ok, try connecting to your phone and check if its charging. If not, check all connections.
If everything is ok, heatshrink the tubes by heating it so that the joints are consealed and wont get loose.
Charge the batteries for 15-20Hrs on first use. NiMH batteries might need 23hr charge. Since the batteries are charged using a very high current, they'll charge quickly. For the same reason, never charge them overnight or unattended. They dont have any cut off circuit to cut the power when full like the phone. Over charging will reduce battery life drastically. Always keep them charged even if not in use.
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