Sanyo 2600mah Unprotected vs High discharge IMR

[Mdemon]

Been doing a little research on 18650 rechargeable batteries & I have a question.

With it's flat discharge rate & great capacity, why isn't this hands down the best mod battery?
It seems to hold a higher voltage over a discharge cycle than any other battery.
True it's not a 10A max discharge, but surely 5.2A is more than sufficient for use in say a LT or a Vamo?
Is it the fact that its an unprotected Li-ion? But now with practically every APV coming with protection against short-circuit, over/under current, STDs, etc., is that a factor still?
Just seems it should be up there with the usual recommendations of AW's or Panny's.

Or am I missing something?
Thoughts from someone hopefully way more knowledgeable than I please...(which admittedly can easily be anyone who answers)

 

[Sad Society]

The part being missed is the charging. The mod may be protected but not the charger. And then it could start a fire. There are threads that are even 'sticky' that are dedicated to batteries and talk about what batteries are considered safe. I would not ever use unprotected batteries.

 

[Kemosabe]

im not sure what the unprotected Sanyo is all about but the IMR batts are not technically protected, as in having a protection circuit. ICR batts do, but IMR batts are considered safe chemistry and do not need a protection circuit. maybe the Sanyo is the same, i really have no idea.

another point of interest is the newish Panasonic batts. theyre CGR. supposedly a type of hybrid. some light reading on them implies that theyre better than AW IMR batts.

 

[Rader2146]

Without getting too deep in the weeds, 5.2 amps doesn't seem to be sufficient for many of the Chinese APVs. The difference is in the average current VS the peek current. Average current can be well below 5.2A but peak current could be more than double of the average (remember we are dealing with a pulsed signal). With certain devices this shows as very poor battery life and/or hitting the low voltage cutoff very quickly because the voltage under load is sagging very low due to the high peak current. I have read a few posts of people using the 3100mAh Panasonic cells (6.2A max discharge) in a Chineese VV APV and hitting the cuttoff within 30 min.

Also, built-in short circuit protection is for the output side of the device. If the resistance is below a certain amount then the device wont fire......but this does not protect from a short inside the device. That means something as simple as a nick in the wrong spot on the plastic wrapper could mean fireworks.

 

[Royaldrunker]

buy the panasonic 10A hybrids

best battery for the buck and safe chemistry

 

[Mdemon]

The part being missed is the charging. The mod may be protected but not the charger. And then it could start a fire. There are threads that are even 'sticky' that are dedicated to batteries and talk about what batteries are considered safe. I would not ever use unprotected batteries.

...Also, built-in short circuit protection is for the output side of the device. If the resistance is below a certain amount then the device wont fire......but this does not protect from a short inside the device. That means something as simple as a nick in the wrong spot on the plastic wrapper could mean fireworks.

Ah yes. Talk about not seeing the forest for the trees......

The Sanyo is just a very good ICR battery, not an IMR or Hybrid.
Even with a great charger & proper care the potential for catastrophic battery failure will still be there.

Which begs another question....

How come so many APV mod kit's are still being sold with unprotected generic batteries & cheap generic chargers? Surely this would be a recipe for disaster?
And what about even Joyetech? Aren't the Samsung 2600's they sell for the eVic unprotected & similar to the Sanyo?

 

[Mdemon]

buy the panasonic 10A hybrids best battery for the buck and safe chemistry

Yeah the CGR's are great, but since they've been discontinued I'm looking at options.

 

[Rader2146]

Efest (Samsung) 2200mAh IMR

Or just but up all the remaining CGR's and put them in your freezer.