How do I calculate load on batteries

[Altair49]

Hey guys

I’m still a bit confused, so I have dual battery and single battery regulated mods. I found out what my CDR is on all batteries, and I understand the watt limits I can put on them. My question is does a dual battery mod double my amp rating, say I have a vtc6 in my single battery therion, which limits me to 45 watts. And I have the same batteries in my boxer 250,does that mean I can go as high as 90?

How do I find out what’s the maximum watts I can safely go at?

 

[classwife]

Moved you to Batteries and Chargers from Ask The Veterans

 

[AzPlumber]

Calculating battery current draw for a regulated mod | E-Cigarette Forum

 

[Topwater Elvis]

In multi cell power devices it is watts per cell.
If you think your cells are good up to 45w - 1 cell = 45w, 2 cells = 90w, 3 cells = 135w

It is explained in the link AzPlumber supplied.

 

[Altair49]

That’s what I thought. Thanks for confirming!

Also, when should he change the batteries? Considering that the wrappers are fine and I charge them in and external charger, should I change them in six months or so of constant use?

 

[Baditude]

On a regulated device the resistance of the coil is irrelevant. Regulated mods separate the input and output voltage; in other words they separate the battery from the atomizer. The only relevant value is the wattage, and the remaining voltage in the battery. The wattage is generated by the mod by multiplying the volts by the amps. As the voltage falls, the mod will increase the amp draw to maintain the selected wattage from the remaining voltage level.

In the interests of keeping things simple:

If you use a good quality 15 amp CDR battery like the Samsung 30Q or Sony VTC6, then you are good up to 45 watts per battery; 90 watts using two; 135 watts for three batteries.

If you use a good quality 20 amp CDR battery like the LG HG2 or Samsung 25R then you are good for 60 watts per battery. If using a 2-battery regulated mod, your good for 120 watts as you have two batteries. If you are using a 3-battery mod, you're good for 180.

If you use a good quality 25 amp CDR battery like the Sony VTC5A, you're good for 75 watts per battery, 150 per two batteries.

If you use a single 30 amp CDR battery like the LG HB6 you are good up to 90 watts; with a pair of 30 amp CDR batteries you could safely do 180 watts assuming the mod cuts off when the batteries reach 3.4 volts.
​

WATTAGE PER SINGLE BATTERY:

20W-45W:
Samsung 18650 30Q, 3000 mah 15/20 amp CDR
Sony 18650VTC6 3000mAh 15/20 amp CDR
20W-60W:
LG 18650HG2 2000mah 20 amp CDR
LG 18650HE2 2500 mah 20 amp CDR
Samsung 18650-25R, 2500 mah 20 amp CDR
Sony 18650VTC5, 2600 mah 20 amp CDR
Sony 18650VTC4, 2100 mah 23 amp CDR
AW 18650 3000 mah 20 amp CDR
30W - 75W:
LG 18650 HD4 2100 mah 25 amp CDR
LG 18650 HD2 2000 mah 25 amp CDR
Sony 18650VTC5A, 2500 mah 25 amp CDR
60W - 90W:
LG18650HB6 1500mah 30 amp CDR
LG18650HB2 1500mAh 30 amp CDR
LG18650HB4 1500mAh 30 amp CDR​

 

[Topwater Elvis]

That’s what I thought. Thanks for confirming!

Also, when should he change the batteries? Considering that the wrappers are fine and I charge them in and external charger, should I change them in six months or so of constant use?

Replace your cells when they give noticeably less run time, get warmer when in use or charging.

More detail ---> When should you replace a battery? | E-Cigarette Forum

 

[Baditude]

Also, when should he change the batteries? Considering that the wrappers are fine and I charge them in and external charger, should I change them in six months or so of constant use?

Change out to new batteries when you begin to notice a decline in performance or a decline in how long they hold a charge under use. So basically it comes down to what you're willing to put up with performance wise.

As a battery ages the mAh (capacity) of the battery degrades, as the mAh degrades so does the batteries c rating (amp limit). So down the road, your 20A battery may only be a 10A battery.

Battery duty cycle is about 300 - 400 charges (expected life expectancy and acceptable performance). Much depends upon how hard the batteries are used or abused. It's a good idea to use a group of batteries and rotate them sequently over time.

 

[Heartsdelight]

On a regulated device the resistance of the coil is irrelevant. Regulated mods separate the input and output voltage; in other words they separate the battery from the atomizer. The only relevant value is the wattage, and the remaining voltage in the battery. The wattage is generated by the mod by multiplying the volts by the amps. As the voltage falls, the mod will increase the amp draw to maintain the selected wattage from the remaining voltage level.

In the interests of keeping things simple:

If you use a good quality 15 amp CDR battery like the Samsung 30Q or Sony VTC6, then you are good up to 45 watts per battery; 90 watts using two; 135 watts for three batteries.

If you use a good quality 20 amp CDR battery like the LG HG2 or Samsung 25R then you are good for 60 watts per battery. If using a 2-battery regulated mod, your good for 120 watts as you have two batteries. If you are using a 3-battery mod, you're good for 180.

If you use a good quality 25 amp CDR battery like the Sony VTC5A, you're good for 75 watts per battery, 150 per two batteries.

If you use a single 30 amp CDR battery like the LG HB6 you are good up to 90 watts; with a pair of 30 amp CDR batteries you could safely do 180 watts assuming the mod cuts off when the batteries reach 3.4 volts.
​

WATTAGE PER SINGLE BATTERY:

20W-45W:
Samsung 18650 30Q, 3000 mah 15/20 amp CDR
Sony 18650VTC6 3000mAh 15/20 amp CDR
20W-60W:
LG 18650HG2 2000mah 20 amp CDR
LG 18650HE2 2500 mah 20 amp CDR
Samsung 18650-25R, 2500 mah 20 amp CDR
Sony 18650VTC5, 2600 mah 20 amp CDR
Sony 18650VTC4, 2100 mah 23 amp CDR
AW 18650 3000 mah 20 amp CDR
30W - 75W:
LG 18650 HD4 2100 mah 25 amp CDR
LG 18650 HD2 2000 mah 25 amp CDR
Sony 18650VTC5A, 2500 mah 25 amp CDR
60W - 90W:
LG18650HB6 1500mah 30 amp CDR
LG18650HB2 1500mAh 30 amp CDR
LG18650HB4 1500mAh 30 amp CDR​

Wow thanks for this! I’m going to save it!