USB Rechargeable Lithium Batteries: USB-C 1.5V 2pk $19.99, AAA 1.5V 4pk $19.99, D 2pk $19.99 + More @ Marine Deals

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Kdzc83 on 18/04/2023 - 12:42 marine-deals.co.nz (259 clicks)
Last edited 18/04/2023 - 13:21 by 1 other user

I've never used these batteries, but the price seems to be worth a try

USB Rechargeable C Lithium Battery 1.5V 2-Pack
Why pay $39.99
ONLY $19.99
SAVE $20.00!
https://www.marine-deals.co.nz/batteries/usb-rechargeable-c-…

USB Rechargeable 9V Lithium Battery
Why pay $27.99
ONLY $7.99
SAVE $20.00!
https://www.marine-deals.co.nz/batteries/usb-rechargeable-9v…

USB Rechargeable AAA Lithium Battery 1.5V 4-pack
Why pay $39.99
ONLY $19.99
SAVE $20.00!
https://www.marine-deals.co.nz/batteries/usb-rechargeable-aa…

USB Rechargeable AA Lithium Battery 1.5V 4-Pack
Why pay $39.99
ONLY $19.99
SAVE $20.00!
https://www.marine-deals.co.nz/batteries/usb-rechargeable-aa…

USB Rechargeable D Lithium Battery 2-Pack
Why pay $39.99
ONLY $19.99
SAVE $20.00!
https://www.marine-deals.co.nz/batteries/usb-rechargeable-d-…

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• 

  netwalk on 18/04/2023 - 12:50

  +1

  I never knew such a thing existed as a USB rechargable battery! It looks like they sacrifice a little capacity for the inbuilt charging mechanism but I'm sorely tempted to give them a go. Off to look for some reviews. Thanks OP.

  • 

    quote on 18/04/2023 - 16:48

    +1

    There is also a design where the top pops off and the usb plug is built in (like a thumb drive) i always liked the idea of those as you didn't need a charger or cord, but ones i bought were always crap quality.

    The 9 volt one here is tempting as my current chatger doesn't charge that shape

  • 

    CheapAzChips on 18/04/2023 - 17:50

    Interesting. Many years ago (over 10?) I bought this style of AA batteries where the + end of the battery was a cap over a full size USB type A plug. I loved them for the convenience, but back then they were all NiMH. Interesting that they all seem to be lithium now, which means conversion losses for both charging and discharging. I'm not sure I like the idea of my "1.5V cells" suddenly cutting out due to the lithium cell being undervoltage. Could get frustrating, but on the upside I suppose you probably get close to the full 1.5V until cutout, rather than a nominal ~1.2V down to <1V for NiMH/NiCad.

    Might have to try some…

  • 

    pdevonporf on 18/04/2023 - 18:54

    +1

    The reason they have a USB charging system is because it's to difficult to make a rechargeable lithium AA battery at1.5 V so the USB charger also is a regulator to keep the output voltage at 1.5.

• 

  bigcheese on 18/04/2023 - 16:01

  +1

  Shipping is additional. Full pricing here
  Looks like it's variable dependent on product weight and address.
  Ranges from $5.99 (Auckland) to $11.99 (North & South Island Rural) for less than 2Kg.

• 

  coffeee on 18/04/2023 - 16:59

  "do not leave unattended while charging". is this common?
  reviews here.
  https://www.amazon.com/Lithium-Rechargeable-Battery-Capacity…

  • 

    akrotohur on 18/04/2023 - 17:12

    I personally do that with all devices, won't leave them charging unattended.

    • 

      CheapAzChips on 18/04/2023 - 17:55

      Non-lithium charging is almost always safe (hydrogen gas emitted from a lead acid battery probably being the next most risky). But yeah, lithium batteries should never be left on charge unattended.

  • 

    CheapAzChips on 18/04/2023 - 17:52

    It's because they're lithium inside. If you like your house you should never charge lithium anything unattended unless it's got excellent cell fault detection (eg. as you'll find in an EV)

  • 

    Latex Fist on 19/04/2023 - 00:18

    One thing I learned from my days of airsoft, is that lithium is not something you want to (profanity) around with.

    Even if not leaving it unattended, I'd always try to charge my batteries in a non-combustible material.

• 

  OmgItsHeaven on 18/04/2023 - 17:30

  I bought the AA one before thinking it was a good deal. The cells only had half the rated capacity. So if you do get them might want to check the capacity of them.

  • 

    CheapAzChips on 18/04/2023 - 18:04

    Interesting again. USB power banks are often touted as having (for example) "20,000mAh" of capacity. However that doesn't mean you can get 20Ah of power out at 5V (your only output voltage option), but rather that the internal lithium cell is rated at that (at 3.7V). So at 5V your total ampere-hours are less (even ignoring conversion losses).

    So interesting here they're reporting mWh instead of mAh, which I always thought was a better measure to use. I guess they report the theoretical max assuming no conversion losses and the battery never cutting out when undervoltage. It's a bigger number and consumers always love bigger numbers 😁

    • 

      danvelopment on 18/04/2023 - 20:29

      I think they use mWh because mAh creates the question "based on what voltage?". EG 2600mWh = 700mAh at 3.7V or 1733mAh at 1.5V.

      Whereas mWh accurately represents both voltages (assuming no conversion loss).

      The fact that the number is bigger is probably just a side benefit.

• 

  rolex on 18/04/2023 - 17:36

  Good one OP,

  We've a device useing annoying 9V's, but nothing to charge w/like @quote says.

  Will try em out, ordered, chur.

• 

  Dan Baker on 18/04/2023 - 19:58

  The PaleBlue are more common brand with higher mA rating. They are using USB C as well.

  https://paleblueearth.co.nz/

• 

  danvelopment on 18/04/2023 - 20:21

  +2

  I wouldn't bother.

  The AAAs seem pointless, at the least.

  USB Rechargeable Lithium AAA Battery Specifications:
  Capacity: 750mWh

  At 1.5V (and assuming no loss when stepped down/transformed), that's 500mAh.

  The Philips NiMH AAAs I posted in the last thread are 800mAh and ~$4 for a pack of two.
  https://www.pbtech.co.nz/product/BATPHS21280/Philips-R03B2RT…

  The AAs are only a little bit better, AA NiMH are usually ~2200mAh. These are 2600mWh which over 1.5V (again assuming no conversion loss) are 1733mAh.

  If there is conversion loss, then they're even worse. It's just the nature of being able to dedicate significantly less volume to the cells because you have to load it with electronics like a BMS, LEDs, a USB port and a transformer or regulator.

• 

  Pox on 18/04/2023 - 21:26

  +1

  Pale Blue Earth do a much better battery. A lot more power but obviously more expensive.