Lithium Charger Booster
Lithium Charger Booster

3.7V Lithium Charger Booster 4.2-27V Output, 5W

5.00 out of 5
2 customer reviews|Add a review

C$1.65

Learn about Availability Status and Backorder

Availability: In stock (can be backordered) SKU: 26932
Quantity discount 2 - 9 C$1.57
Quantity discount 10 - 19 C$1.49
Quantity discount 20 + C$1.40

Description

This tiny Lithium Charger Booster with 4.2-27V Output voltage can charge a single 3.7V Lithium cell with a maximum current of 1A.

An adjustable booster (step-up) converter delivers an output voltage of 4.2-27V with a maximum power of 5W.

Power can be supplied through terminals or the USB port. An input voltage of 4.5-6V at min. 1A is required.

All terminals for input, output and battery connection are clearly marked.

The module size is 33 x 23mm.

2 reviews for 3.7V Lithium Charger Booster 4.2-27V Output, 5W

  1. 5 out of 5

    Michael Gatto (verified owner) –

    Rock solid little beast of a circuit.
    When I first wired it up, it showed the output voltage. equal to the input voltage — Li-Ion battery charged to 4.1 volts.
    There is a little trim-pot on board. I couldn’t get the voltage to change when I put a little phillips screwdriver in it. Luckily, I had a micro driver blade set. I found one small enough to fit into the trim pot and adjusted it to the 9 volts I needed. When you insert the screwdriver blade input the trim, it will jump a little higher than the voltage you might want, but after you remove the driver it will drop a little (a tenth o volt or so). So, adjust up, see where you are, then re-adjust as needed

    My goal was to eliminate the battery pack needed to power a portable midi keyboard (the type you wear like a guitar). That battery pack is 6 – 1.5 volt AA batteries.

    Now, this new battery pack as rock solid at 9.1 volts and doesn’t waver when the unit is powered up.

    I can’t tell you how well the charging feature works because I haven’t needed to charge the pack yet.
    But, at $2 each board, they are worth it to me.

    Lithium batteries come is a lot of different sizes and capacities. Pick the capacity you need for your project. My keyboard draws 38 milliamps, so I expect this circuit to run for a long time with 1 amp batteries in the pack.

  2. 5 out of 5

    radcomtech (verified owner) –

    I second M. Gatto review above. This step-up boost convertor and Li-Ion management breakout board is an excellent Li-Ion battery substitution for 9 or 12 or 24V projects. At 24V the 5watt power output is around 190mA (4.5Watt) and the ripple above 20V is higher than expected, about 200mV p-p, but high enough frequency so I could shunt that noise using a 0.47uF 50V ceramic Cap across the output (down to 45mV). Here is an example of one application: powering a Whites Metal Detector requiring 8 AA cells using just on 18650 Lithium while managing Charge to the Li-Ion cell. The runtime of the Detector in Pulse mode will be extended, and when I get home, I can charge the lithium back up.

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