i finally finished my cell phone mod. it works pretty good but 3.7 volts is just not gonna cut it for my vaping needs. thankfully i have a few local requests for them 
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i plan on taking pics and making a walk thru for the model i used, which was a MOTOROLA V551. if anyone has a similar phone i'll provide a quick description of what i did.
1. remove back cover and battery, and then unscrew the 4 screws (one at each corner. then remove the back assembly that the antenna screws into.
2. prepair the battery/atty connector by soldering wires to both positive and negative side of the connector. (for this phone model use a 3 inch wire to connect to the negative prong of the PCB/BATTERY interface ((a set of 4 small prongs that touch the contacts on the battery when inserted))). and use a 1.5 inch wire on the positive side, this wire will connect to the push button that fits where the headphone jack is on top of the phone ~1" from the antenna hole.
3. drill out the antenna hole till it's almost big enough to hold the battery connector of your choice. (i used a 901 since it's what i have extra attys and connectors for). before placing batt connector into antenna hole line the inside of the housing with a little epoxy to hold the connector in place and then press fit the connector into the hole.
4. the headphone connector just pops out of the phone leaving room to install a SMALL switch there (you may have to cut a bit of plastic to make room unless you have tiny switches). screw the switch into the hole to mount the switch, then take the 1.5" wire and soldier it to one leg of the switch connector. then solder a 2 or 3" wire to the other leg of the switch and solder the other end of this wire to the outside positive pin of the connector of the PCB/BATTERY interface ((the set of 4 small prongs that touch the contacts on the battery when inserted))).
to clarify the 2 outside pins are the positive and negative power pins. i think the 2 in the middle are for monitoring battery status but i'm not sure.
5. using a voltage meter, you can test for continuity between negative pin and battery/atty threads, repeat the same test with the psoitive pin and battery/atty center. these tests must be done while pressing the installed switch. if those have continuity, reassemble and insert battery. then test voltage by pressing button while meter probes are on the center of atty conector and atty connector threads respectivly... you should get a reading of 3.6 or higher if battery is fully charged.
this model of cell phone is ideal for such a mod and other than the 3.7v battery.
pictures and a more detailed walk thru will follow in the next few days.
maybe i'll get my DX battery order soon so i can test out my magnum flashlight mods (one w/ a 5v regulator 7805,, and one with the step-up regulator),, and my copy of cisco's laser mod.
hope to post back soon! i'll be posting the actual walk-thus in the battery mod sub forum, but i'll link to them here.
'
i plan on taking pics and making a walk thru for the model i used, which was a MOTOROLA V551. if anyone has a similar phone i'll provide a quick description of what i did.
1. remove back cover and battery, and then unscrew the 4 screws (one at each corner. then remove the back assembly that the antenna screws into.
2. prepair the battery/atty connector by soldering wires to both positive and negative side of the connector. (for this phone model use a 3 inch wire to connect to the negative prong of the PCB/BATTERY interface ((a set of 4 small prongs that touch the contacts on the battery when inserted))). and use a 1.5 inch wire on the positive side, this wire will connect to the push button that fits where the headphone jack is on top of the phone ~1" from the antenna hole.
3. drill out the antenna hole till it's almost big enough to hold the battery connector of your choice. (i used a 901 since it's what i have extra attys and connectors for). before placing batt connector into antenna hole line the inside of the housing with a little epoxy to hold the connector in place and then press fit the connector into the hole.
4. the headphone connector just pops out of the phone leaving room to install a SMALL switch there (you may have to cut a bit of plastic to make room unless you have tiny switches). screw the switch into the hole to mount the switch, then take the 1.5" wire and soldier it to one leg of the switch connector. then solder a 2 or 3" wire to the other leg of the switch and solder the other end of this wire to the outside positive pin of the connector of the PCB/BATTERY interface ((the set of 4 small prongs that touch the contacts on the battery when inserted))).
to clarify the 2 outside pins are the positive and negative power pins. i think the 2 in the middle are for monitoring battery status but i'm not sure.
5. using a voltage meter, you can test for continuity between negative pin and battery/atty threads, repeat the same test with the psoitive pin and battery/atty center. these tests must be done while pressing the installed switch. if those have continuity, reassemble and insert battery. then test voltage by pressing button while meter probes are on the center of atty conector and atty connector threads respectivly... you should get a reading of 3.6 or higher if battery is fully charged.
this model of cell phone is ideal for such a mod and other than the 3.7v battery.
pictures and a more detailed walk thru will follow in the next few days.
maybe i'll get my DX battery order soon so i can test out my magnum flashlight mods (one w/ a 5v regulator 7805,, and one with the step-up regulator),, and my copy of cisco's laser mod.
hope to post back soon! i'll be posting the actual walk-thus in the battery mod sub forum, but i'll link to them here.
