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26800mAh Power Bank 18W PD & QC 3.0 with 4 Output & 3 Input $40.94 Delivered @ Charmast AU Amazon AU


Regular Price: $62.99
5% Coupon + B7FFX564 Coupon
Deal Price: $40.94

【18W Power Delivery USB-C Port】: Type-C port with PD protocol provides 9-12V high voltage output, well work for your your MacBook/ new Type-C iPad Pro/ new 13" MacBook Air with Retina display. The USB-C port is versatile, also with QC 3.0 protocol that means it will charge your compatible devices with the fast charging speed. (USB-C to Lightning cable is not included)
【Massive capacity and high-speed charging】 Up to 26800mAh capacity, with QC 3.0. The slim battery pack has two standard USB ports and one USB-C port that you can use to charge multiple devices at the same time. The iSmart port will recognize your devices, adjust to optimal charging settings to save your charging time in half.
【Universal Compatibility】: The fast charging battery pack charges the devices like iPhone Xs/XR/X/8, Google Pixel, Sony, and etc. USB-C cell phones. It charges iPhone 8 7 times, Galaxy S8 5 times, ipad mini 3 times, 2017/ 2016 Macbook and tablets at least 2 times, notebook at least once.
【Ultra thin and fashion design】 Ultra slim design with only 14mm thickness, solid and portable. Solid rubber oil surface cover to enjoy a good feeling and to protect your devices from scratches or falls, great for traveling.
【Safe and Reliable】 CE, RoHS, FCC certified quality in manufacturing. Intelligent safety protection to protect against excessive current flow, overheating and overcharging. And the warranty is 12 month.

Charmast Power Bank 23800mAh 18W PD & QC 3.0, 4 Output & 2 Input Portable Charger, LED Dispaly Fast Charging External Battery Pack Compatible with Phones and More
Original Price: $52.99
Deal Price: $45.04
Code: 15% Coupon (Plase apply the Coupon when you check out)
Link: https://www.amazon.com.au/dp/B08M9NMHMV

Charmast Power Bank, Mini 10400mAh USB C PD 18W & QC 3.0 Quick Portable Charger Bank with 3 Outputs & 2 Inputs, Smallest External Battery Pack Compatible with iPhone12/Pro Max/Pro, Samsung, Tablets, and More
Original Price: $37.99
Deal Price: $34.19
Code: 10% Coupon (Plase apply the Coupon when you check out)
Link: https://www.amazon.com.au/dp/B08B4MMHKC

Price History at C CamelCamelCamel.

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  • Stuffed up the order the first time, make sure you tick the 5% off tick, then apply the coupon at checkout

  • +10

    OP, What is the actual capacity of this powerbank? There's a couple posts that say it is actually around 20000mAH. https://www.youtube.com/watch?v=utR9S4FFJm0

    • OP please disclose your spec document for the unit to prove the true capacity.

    • Specifically if OP could list what voltage the AH are measured at. I wish all these were marketed with Watt Hours. I've seen too many claim ridiculously high mAH, but when you scratch the surface, they are at low voltage, which gives a high AH value.

    • There's a couple posts that say it is actually around 20000mAH. https://www.youtube.com/watch?v=utR9S4FFJm0

      My tests had about the same results as that YouTube video. Charmast never addressed it.

    • Much misinformation around here. Delivered power varies widely depending on current and voltage. It could be 5000 or even 15 000+ for a powerbank like this depending on what voltage and current is used. At PD current it would be well under 10 000. At low 5v 1a you'd be getting closer to 15 000. You're not really comparing the right metrics if you just want to know "actual capacity".

      Thing is, if the manufacturer is honest the cells may well be 26 800 capacity and rated as such by the cell supplier. But through the charging circuitry and firmware it will deliver different amounts of power. Two powerbanks can use the same cell but from different manufacturers and deliver different amounts of power again.

      You won't truly know the capacity until it's tested properly as they do over at https://budgetlightforum.com/forum/batteries/usb-power/revie...

      What i'd want to know from OP is the manufacturer of the cell and it's rated capacity, which would give you a generally good indication of where to start. If it's a generic supplier that they won't name then that's bad news. Xiaomi use Panasonic, LG, and Samsung cells. They are true to rated capacity.

      • At low 5v 1a you'd be getting closer to 15 000.

        I got about 14,500mah at 5V 1A and 2A after several cycles. The max this power bank can put out is only 18W so the effective capacity will only go down as the current goes up. I don't see how the cell could even approach 26800mAh.

        But through the charging circuitry and firmware it will deliver different amounts of power.

        It is in the manufacturer's best interests to deliver maximum capacity at all times. They will be limited by the efficiency (and thermal management) of the boost converter they use. I have never seen efficiency below 70% though.

  • I think in this regard kogan will be a better choice

    • Will the Kogan one be thicker and less mah compare to the one advertise? Edit: comment above indicate the charger is only 20000. So Kogan could be better, although if Kogan first trial is used before, there is a 7.99 delivery fee but still work out cheaper provided if the user don't mind a thicker battery bank.

      • +1

        i have it , it aint that thick and works pretty well

  • I thought most users understood with the 3.7v to 5v conversion you usually loose%30 of advertised size

    • +1

      I got 14,500mAh out of it at 1A and 2A. With a boost converter efficiency of 70%, that's 20,714mAh which matches a 21,000mAh LiPo in terms of both capacity and dimensions.

  • I bought I bought even after I as the video above

  • Why don't I see the 5% coupon?

    • It's a tick box on the first page

  • I'm trying to work out if the smaller ones are 100 or less Wh so they can be taken on board Qantas flights without pre approval. But I'm not the most tech savvy person out there.


    Note: Watt hours (Wh) are determined by multiplying the voltage (V) by the amp hours (Ah). ie. 12V x 5Ah = 60Wh

    I also found this calculator but can't seem to see the voltage of the batteries. Any ideas?

    • +1

      The mAh ratings are at 3.7V so you use that as the voltage.
      26800mAh = 26.8Ah
      So 26.8 x 3.7 = 99.16Wh which is just under the limit.

      Based on my testing I believe the 26800mAh rating is false, though. I believe the cell is only 21,000mAh which makes it 77.7Wh which is much lower than the 100Wh limit.

    • Most cheap powerbanks such as these use 3.6v-3.7v batteries. So as rated, this would be 26800 x 3.7 = 99.16wh.