hello, Im Cristian, new here
I have normal knowledge of electronics, I can build a circuit, but I can figure out how to use a 18650 battery on my omnia i900
it's an Ultrafire 18650 3.7V 2400mAh, the omnia i900 battery is 3.7V 1440mAh
I tryed to connect directly to the battery connectors (I take out the batt from the phone), (+) on (+), (-) on (-) with wires but the phone doesn't turn on, the wires get a litte hot near the connectors and make a spark when I touch it, I don't understad why, it's same energy, buts more current?
when I test with a multimeter the voltage of both batteries at full charge are the same 4.16V, both are li-ion batteries
plus I use 3 AA rechargeable and alkaline batteries to supply my sony ericsson K310@W200, it has a 3.6V 750mAh battery, the rechargeable batteries I use are original sony's 2000mAh, both test on success, but the phone shows 0% at battery metter and acts weird, its turn off at times, others nope, with the 18650 it doens't turn on
so, what I need to do here, a current regulator? and a circuit to give to the phone whatever it needs on the middle contact?
I think that should be plausible to use this battery (never mind about the wires, its for emergency)
in the other hand, a converter to 5V usb-like charger using a 18650 battery will be ok, perhaps this battery can make 1.5 or 2 full charges
but I really want to directly supply the omnia, I mean directly on the connectors, taking advantage from 2400mAh, probably it last much more
ideal for long trips
can someone help me on this, to build a regulator
I have normal knowledge of electronics, I can build a circuit, but I can figure out how to use a 18650 battery on my omnia i900
it's an Ultrafire 18650 3.7V 2400mAh, the omnia i900 battery is 3.7V 1440mAh
I tryed to connect directly to the battery connectors (I take out the batt from the phone), (+) on (+), (-) on (-) with wires but the phone doesn't turn on, the wires get a litte hot near the connectors and make a spark when I touch it, I don't understad why, it's same energy, buts more current?
when I test with a multimeter the voltage of both batteries at full charge are the same 4.16V, both are li-ion batteries
plus I use 3 AA rechargeable and alkaline batteries to supply my sony ericsson K310@W200, it has a 3.6V 750mAh battery, the rechargeable batteries I use are original sony's 2000mAh, both test on success, but the phone shows 0% at battery metter and acts weird, its turn off at times, others nope, with the 18650 it doens't turn on
so, what I need to do here, a current regulator? and a circuit to give to the phone whatever it needs on the middle contact?
I think that should be plausible to use this battery (never mind about the wires, its for emergency)
in the other hand, a converter to 5V usb-like charger using a 18650 battery will be ok, perhaps this battery can make 1.5 or 2 full charges
but I really want to directly supply the omnia, I mean directly on the connectors, taking advantage from 2400mAh, probably it last much more
ideal for long trips
can someone help me on this, to build a regulator