Mentos PowerBank

23,334

472

29

Introduction: Mentos PowerBank

this is my first time doing an instructable so go easy on me

Step 1: Stuff You Need

18650 3.7v 2200mah (from old laptop battery)
1A lithium charging module ($1.39 dx.com)
0.9v - 5v step up boost module ($1.99 dx.com)
slide switch ( from a broken toy)
Mentos chewing gum container

Step 2: Wiring

solder wires into module and battery + to + and - to - dont put it on backwards unless you want your modules to get toasted

Step 3: Stuffing Everything Inside

this is the hardest part for me since the container is too small. but you can figure it out.

Step 4: Done!

dont expect this to full charge your phone. when charging the powerbank red led means charging and green for full

Be the First to Share

    Recommendations

    • Toys & Games Contest

      Toys & Games Contest
    • Big vs Small Challenge

      Big vs Small Challenge
    • Fix It Challenge

      Fix It Challenge

    29 Comments

    0
    Ganesh sivakumar
    Ganesh sivakumar

    4 years ago

    instead of a 2200mah battery can I use 9v battery

    0
    pedrolrmurarolli
    pedrolrmurarolli

    Reply 8 months ago

    I guess, but you need to use a step down for the output

    0
    betmac
    betmac

    Reply 2 years ago

    Yes, use as many as you like as long as its parallel, but the problem would be charging time unless you can charge each cell individually

    0
    DaytonaPete
    DaytonaPete

    5 years ago

    Very nice and simple. I'm building one!

    0
    dmahato
    dmahato

    5 years ago on Step 4

    Hey, what about battery discharge protection ????

    0
    betmac
    betmac

    Reply 5 years ago

    www.dx.com/p/tp4056-4-2w-1-2a-5v-lithium-battery-charging-discharging-protection-module-w-micro-usb-blue-397213#.VgXcBTOwrqA

    0
    kartik negandhi
    kartik negandhi

    6 years ago

    can I connect 4 18650s in parallel to extend the mAh of the bank? or if not 4 den at least 2?

    0
    neopolitan
    neopolitan

    Reply 6 years ago

    yes in theory, but in practise you need to isolate the cells from each other

    0
    OrlandoSailor
    OrlandoSailor

    Reply 5 years ago on Introduction

    Please explain what you mean by "isolate the cells from each other". I would like to use the same parallel design suggested above. Thx!

    0
    lazychris2000
    lazychris2000

    Reply 5 years ago

    Basically, you would use a diode on each battery to prevent it from back-charging the other batteries.
    Make sure you install them in the correct orientation because it only allows the charge to flow in 1 direction

    0
    MagnusK
    MagnusK

    5 years ago on Introduction

    Hey, do you know what gauge wire you used?

    0
    betmac
    betmac

    Reply 5 years ago

    im not sure. i just scavenge those wires from a broken fan.

    0
    JasonM11
    JasonM11

    5 years ago on Introduction

    if you want longer batt life you can get wafer type RC 1 cell lithium's from hobby king for a very cheap price, great build by the way.... Lastly everything in life is dangerous however, this isn't going to be risky the current coming out of the battery is very low. If you were to allow the battery to get to low of a charge and it was an unprotected battery then you could have an issue. but that battery is protected so there isn't any worries there.

    0
    samalert
    samalert

    5 years ago on Introduction

    How much time does is take to fully charge a cell phone from Dead.