Specification: Single AA Battery Holder: Color: Black Material: plastic and metal Size: 76*23*20mm TP4056 Lithium Battery Charger Module: Input voltage: 5V Charging cut-off voltage: 4.2V ± 1% Maximum charge current: 1000mA Battery over-discharge protection voltage: 2.5V Battery overcurrent protection current: 3A Board size: 2.6 * 1.7CM Note: The charge should disconnect the load OUT terminal on the positive and negative can not be wrong, please according to specifications, otherwise it will damage directly. Boost Converter Module: Nature of the module: unfenced step-up (Boost) Rectifying way: synchronous rectifier Input range: 3 V to 32 V Output range: 5 V to 35 V Input current 4 A (maximum), no-load 18 mA (5 V input, 8 V output, no-load less than 18 mA. The higher the voltage, the greater the no-load current) Conversion efficiency: < 94 % (the greater the pressure difference, the lower the efficiency) Switching frequency: 400 KHZ Output ripple: 50 mV (the higher the voltage, current, the ripple is larger) Load regulation: plus or minus 0.5% Voltage regulation: plus or minus 0.5% Working temperature: - 40 ℃ to + 85 ℃ Overall dimensions: 43 mm x 21 mm to 14 mm (length x width x height) Warning: this is only for the increasing output voltage; The input voltage should not be over 30 V to avoid any possible damage Package Included: 4 * TP4056 Lithium Battery Charging Board Charger Module 4 * Boost Converter Module 4 * Single AA Battery Holder 1 X 1.5V
G**Y
these are garbage and dangerous! avoid this supplier.
Crap. The boost converters are garbage unless you want 15-30v because the pot adjustment stops at that (tested using 1-2amps @5v >. All four are this way, with a variance of +/4v. The charging circuit is iffy as well, but I haven't tested extensively enough. Lol and yes, the AA bat holder is garbage because it was implied to be an 18650 holder until after i purchased and received.
R**S
Charging circuit seems OK, the rest is bad
I got these to use as a power supply for a prototype arduino build i'm making. The battery holders are standard AA sized NOT 18650, and the boost converters spike up in voltage whenever the current draw changes, up to 30v sometimes, I've fried two of my Nano's already using two different converters (tested the second time and saw the spike!) Stay away from this product and probably this seller.
T**7
H
Gghbh
B**N
Almost right
Regular AA size holders, not 18650.
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