Square nickel strip 4x18650

NTC thermistor - with a negative temperature coefficient, i.e. an increase in temperature causes a decrease in resistance.   Thermistor NTC 5.0K 5% MF52A epoxy resin coating resistor features:

Size: 3mm
Rated resistance: R25 = 5.0k
B value 25/85 = 3950°K
Rated power: ‰¤ 50mW
Tolerance:± 5%
Operating temperature: from -40°C to +125°C  Tinned steel wire 25mm

TP4056 Lithium Battery Charger Module 5V mini USB features:
- Based on TP4056ES regulator
- Lipo mini USB Li-Ion charger
- Input Voltage: 4.5V - 5.5 VDC
- Full charge voltage: 4.2V +/- 1.5%
- Max Output Current: 1A
- Indicator LED: charging red, charging green
- Operating temperature: -10ºC to + 85ºC
- IN + and IN- connection for electronic circuits
- Battery protection against over-discharge voltage: 2.5V - Protection against over current battery: 3A
- Measurements: 25x19x5 mm
- Ideal for 18650 batteries

Rocker Switch 3A 250V On/Off SPST features:
- AC 250V 3A 2 Pin ON/OFF I/O SPST Snap in mini oscillating switch
- Rocker switch; Type: On/Off (SPST)
- Control on and off SPST and 2 terminals
- Voltage and Current: AC250V, 3A
- Overall size: ~ 1.5 x 1 x 1.7 cm/0.6"x 0.4" x 0.7 "(L*W*H)
- Mounting hole size: 1.35 x 0.8 cm/0.53"x 0.315" (L*W)
- Black

Pre-cut insulating base for electrode, base without holes for 4x 18650 batteries. Self-adhesive pad isolates and protects battery contacts from short circuits. Stick to the battery after sealing it in a package.

Pre-cut insulating base for electrode, base with holes for 2x 18650 batteries. Self-adhesive pad isolates and protects battery contacts from short circuits. Stick to the battery after sealing it in a package. If the connecting tape becomes hot, insulation protects the battery against damage to the casing and against short circuits.

Adjustable Module Buck Converter DC 3A 1,6-26V MP1584 Step-Up Down features:
- Based on the MP1584EN regulator
- Output Voltage: 1.6V - 26V DC (adjustable)
- Input Voltage: 4.5V - 28V DC
- Max. Output Current: 3A (with heat sink)
- Frequency: 1MHz
- Conversion Efficiency (1A): 94%
- Short circuit protection
- Protection against overheating
- Operating temperature: -40ºC to + 85ºC
- Measures 22 x 17 x 4 mm

In the case of a battery pack, the BMS (Battery Management System) balancing protection circuit allows charging and discharging to be individually controlled. That is, the circuit controls that all cells are charged and discharged at approximately the same voltage. The current during charging should be limited, because the cell will "absorb" the current given to it, but a higher current than the one established by the manufacturer (generally a safe current is 1C ) can cause the cell to overheat and, in extreme cases, explode. The same relationship also applies to discharge.

Characteristic: - Cable 15cm long
- Measurements 74x21x 19mm
- Weight: 8 gr. (approx.)
- Stack length max 67mm