Buzz Pro and batteries questions

[Codrut Popescu]

I have become very careful with handling Li-Ion batteries and as a result I have even bought a hobby charger to charge my Powerizers. This is the ultimate charger, it has a display and it displays the elapsed time, the current batteries voltage and you can set the cutting voltage very precisely and the charging rate. You can even set alarms if the charging passed a certain amount of time or if more than a certain amount of mAh was pumped into the battery. I am using a restrictive 300 mAh charging rate/battery with a cut at 4.2 V at the time being. My questions are however related to the Buzz Pro:

1. What is the designed low voltage at which the Buzz Pro cuts the batteries and considers that the cells are discharged? I have measured 2.890 and 2.910 with my Fluke 175 DMM which has an accuracy of +/- 0.01V in this range

2. When the batteries are discharged both LEDs (the blue + the red) are activated. Right?

3. Why people recommend changing the order of stacked batteries? I have not noticed any significant difference in the discharge of the two stacked cells. As far as I understood there is a theory that the cell which is upper and connected with the + (anode) is stressed more. Why is that? Is this theory backed up by facts?

Thanks

 

[sadtranz]

Can answer no2 light stay's red when battery low

no3 when i used stacked batteries in an unregulated mod the bottom battery ie the one further from the atty connector used to run down far quicker, on the Buzz being regulated have as you say not noticed any great variation

sure someone will be along who know's no1

 

[BuzzKill]

I have become very careful with handling Li-Ion batteries and as a result I have even bought a hobby charger to charge my Powerizers. This is the ultimate charger, it has a display and it displays the elapsed time, the current batteries voltage and you can set the cutting voltage very precisely and the charging rate. You can even set alarms if the charging passed a certain amount of time or if more than a certain amount of mAh was pumped into the battery. I am using a restrictive 300 mAh charging rate/battery with a cut at 4.2 V at the time being. My questions are however related to the Buzz Pro:

1. What is the designed low voltage at which the Buzz Pro cuts the batteries and considers that the cells are discharged? I have measured 2.890 and 2.910 with my Fluke 175 DMM which has an accuracy of +/- 0.01V in this range

2. When the batteries are discharged both LEDs (the blue + the red) are activated. Right?

3. Why people recommend changing the order of stacked batteries? I have not noticed any significant difference in the discharge of the two stacked cells. As far as I understood there is a theory that the cell which is upper and connected with the + (anode) is stressed more. Why is that? Is this theory backed up by facts?

Thanks

they say 2.75 volts on the suppliers site ( where we get ours ) for #1
swapping cells is something I have never done CUT That does NOT mean it does not help , I am LAZY !

 

[Codrut Popescu]

Thank you sadtranz!

I have just measured the last discharged batteries, they measured about 2.9 and 3.4 respectively. So this time the difference was visible. But I have put the 2.9 on charging and in about 1 minute the voltage increased to about 3.3 (I am using a hobby charger and it displays the battery voltage while charging, I also double checked with my DMM). I guess that when a battery is discharged at about 3.4 then the voltage drops very quickly.

In regards with the unequal discharge of two identical batteries, I don't see any explanation on why the upper one should be stressed more than the other one. The only explanation I see is the difference between the two in quality. Two batteries from the same manufacturer and lot should be pretty identical, but perhaps not quite identical and any slight difference will be visible. I simply don't think that if two batteries discharge differently it is a matter which one is on top but a matter of how they are build. But I would like to see an explanation of this. I googled it and could not find anything relevant.

Please notice that I am not complaining at all about the Buzz Pro here, I am perfectly happy with it. I am only trying to educate myself on how it works. It is important to learn about batteries and how to use them properly. This is a discussion about batteries.

 

[Codrut Popescu]

they say 2.75 volts on the suppliers site ( where we get ours ) for #1
swapping cells is something I have never done CUT That does NOT mean it does not help , I am LAZY !

Thank you Mike!

 

[BuzzKill]

not all batteries are created equal, they have to be hand matched to get them to discharge at the same rate ! , we do not do this , ( It would add cost to the batts and it is very time consuming. ) we have never had a battery issue with the ones we use now, we WILL however change to a protected type battery soon that has about the same capacity as the current Powerizers we have, we are doing this to comply with the new ECF specs that have been made in this post on ECF http://www.e-cigarette-forum.com/fo...pecification-metal-tube-mods.html#post5388506

We intend to be up to SPEC. in about 2 weeks , hopefully ECF will post this info that Notcigs has complied with the new spec that they have developed .

We do have a surprise in store for the NEW IMPROVED BUZZ BOLT !! that is an ECF SPEC device.

 

[Codrut Popescu]

Thanks Mike for the explanation. Ah, and I want the new Buzz already

 

[arkador]

to the concern about the top or bottom battery feeling the drain harder, I simply pay no attention to which battery i put in the charger, or into my buzz first. By the laws of probability, one battery gets into each place in the charger and buzz pro half the time.

 

[tidegirl]

I would have to have a spreadsheet to keep up with which battery in which set needs to go to the top and which to the bottom. Then I would most definitely not keep up with the spreadsheet. I'm going with arkador's laws of probability theory.

 

[arkador]

I do label my batteries, 1, 2 and 3, in pairs, that way I at least keep them together as a pair.