Replacing the battery in an Innokin CoolFire IV

Preamble

Do you need to replace the battery in your Coolfire? If so, then read on…

Most of the CoolFire IV models use 18650 soldered batteries, except the TC 100 which uses a LiPo pack.

See also

Links

From Innokin coolfire 4 battery replacement,

I’ve just fitted a new battery in the cool fire 4, not hard at all.
the battery cost £7 for a 3000 mAh and 30 mins of my time.

and

Product Description
Efest 18650 Battery

Efest IMR 18650 Battery is a mod battery suitable for the advanced mod kits such as the Innokin iTaste Cool Fire Mod or Kangertech Sub Box Mod.

Specifications

  • Ampage: 20 / 35 amps
  • Capacity: 3000 / 3100 mAh
  • Voltage: 3.7 volts
  • Li-mn
  • IMR 18650

See LiPo – Chemistries

 Videos

Coolfire IV takedown

Innokin coolfire 4 tc100w broken/teardown

Innokin Cool Fire IV Died!

Innokin CoolFire IV TC 18650 Review + Charts + Disassembly, disassembly at 16:27

CoolFire IV TC 100

The Innokin Cool Fire IV TC 100W and iSub-V – DJLsb Vapes Reviews and Giveaways, disassembly at 23:08

Note that the TC100 does not use a 18650, but a dual LiPo pack:

CoolFire IV TC 100 LiPo pack
CoolFire IV TC 100 LiPo pack
CoolFire IV TC 100 LiPo pack (side view)
CoolFire IV TC 100 LiPo pack (side view)
CoolFire IV TC 100 LiPo pack (date view)
CoolFire IV TC 100 LiPo pack (date view)
CoolFire IV TC 100 LiPo pack (front view)
CoolFire IV TC 100 LiPo pack (front view)
CoolFire IV TC 100 LiPo pack (front view #2)
CoolFire IV TC 100 LiPo pack (front view #2)

The battery, a W922565P, from Prismatic Polymer Battery:

    Key features

  • High capacity, high energy density and high voltage (>620Wh/L).
  • Long cycle life, remains more than 80% capacity after 1000 cycles.
  • Outstanding safety performance, good reliability performance, adapting to different environment.
  • Achieve IEC62133, UL1642, UN38.3, PSE, CE and other international certifications.
  • Range of size is wide, much thinner, wider and longer.
  • Good consistence.

Specifications:

Model Capacity
(mAh)
Size(mm) Weight
(g)
Impedance
(mΩ)

Voltage
(V)

Tab Width
(mm)
Tab Center Distance(mm)

Specifications of CoolFire IV TC 100 battery

Model Capacity
(mAh)
Thickness (mm) Width (mm) Height(mm) Weight
(g)
Impedance
(mΩ)
Voltage
(V)
Tab Width
(mm)
Tab Center Distance (mm)
W922565P 1550 9.2 25 65 30 50↓ 3.7 4 11.0±2.0

Note that, in the photos, the LiPo pack has “12.21 WH” which is watt-hours (Wh) printed on the side. This unusual unit, is the voltage multiplied by the battery’s capacity, see Dumb question About Li-polymer batteries. So, 1.550 Ah x 3.7 V = 5.735 Wh, 5.735 x 2 (dual pack?) = 11.47 Wh. So I am not sure where the 12.21 comes from, but I have seen it quoted for other batteries, see RMRC Orange Series – 1100mAh 3S 35C Lipo – JST (12.21Wh). For this example the figures make sense: 3S battery => (voltage 3.7 V x 3) x (capacity 1.1 Ah) = 12.21 Wh

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