arduwino wrote:What is the output voltage of the MintyBoost in "zone B"?
What is the current draw in "zone B"?
the output voltage of mintyboost is 4 Volts...
arduwino wrote:the output voltage of mintyboost is 4 Volts...
The voltage is sagging because the phone is pulling more than the MintyBoost can supply.
How do you have your 4 NiMH cells connected? Series or parallel? As discussed earlier, conecting them in series will give you a higher input voltage that will allow the MintyBoost to operate more efficiently.
I have done all the debugging myself and received no useful advice.
Again please tell me why is it so inefficient ?????
I mean .... all the other guys.. have just two batteries and they should have this problem also...
arduwino wrote:I mean .... all the other guys.. have just two batteries and they should have this problem also...
1) Which two batteries?
2) What phone?
3) And for how long?
arduwino wrote:Your graph shows that your phone did charge for a 3 hours with two NiMH cells.
arduwino wrote:In any case, it is clear that your phone does not like it when the output voltage drops substantially.
arduwino wrote:This is addressed in the documentation. See "When to stop charging":
Next is the schottky diode D1. This diode is part of the boost converter. Essentially it is used to make sure energy is transfered in only one direction-from the batteries to the USB port.
So what do I do now?
But, as yeoj4151 has said, the phone may think that it is connected to a wall charger
You could carry an extra pack and charge in 3 hour shifts with one of the batttery configurations you have tested so far.
You could look into Lithium cells.
You could investigate other charging alternatives
What you are looking for may well be beyond the capabilities of this device.
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