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Panasonic Eneloop Mobile Booster $9.98 + $5.95 Delivery @ Dick Smith

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Panasonic Eneloop Mobile Booster $9.98 + $5.95 Delivery @ Dick Smith
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[Deactivated] on 16/03/2015 - 07:32 dicksmith.com.au (1051 clicks)
Last edited 16/03/2015 - 11:57 by 1 other user

It's back again.

This deal is online only and today only, no click and collect.

With its portable, lightweight design, the QE-PL102 fits neatly in your bag, suitcase, briefcase or glove compartment to go everywhere you do. And when its high-capacity 2,650 mAh lithium ion is fully charged, you'll have up to 1.5 hours of charging power - enough to charge a typical smartphone one time. Ideal for keeping your smartphone, tablet or other USB-powered devices charged and ready to use at work, school, business and anytime on the go. Perfect for travel too.

Mobile Mobile Phone Accessory Panasonic Power Bank

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  • unity1 on 16/03/2015 - 08:15
    +7

    This deal is online only and today only, no click and collect.

    Believe me, it's been on sale many times before at this price and will continue to be in the future.

    • Snoop on 16/03/2015 - 10:45
      -1

      They have to say 'today only' because; a. The noobs that have only just heard of Eneloop will jump on them; b. We need more quality listings like this on OzB daily! ;)

  • [Deactivated] on 16/03/2015 - 08:42

    nothing special about Eneloop's anymore.

  • cloudie9 on 16/03/2015 - 08:42
    +1

    Just received this battery few days ago from the recent sale, all I can say this product is mediocre. Product says rated up to 2850 mAh so I tried to charge my Moto G which is 2070 mAh capacity, charge it from 14%, left it overnight, and the next day it managed to charge my phone up to 87%, so how is that logical for a product that is under rated? Its nice for portability and getting some juice to have your phone last until you get back home but don't expect it to perform as advertised!

    • twister292 on 16/03/2015 - 09:07
      +1

      2650 mAh most likely at the charging voltage of 3.75v. Phones draw out 5v, so the effective capacity is about 75% of the theoretical capacity.

      That's why Xiaomi for example say on the 16000mAh powerbank that it delivers an effective 10,000 mAh.

      • gizmojo on 16/03/2015 - 10:04

        It is not because of battery and output differences. It is about how much you can trust the manufacturer's ratings and what particular ratings they are quoting in mAh, which is simply a unit for stating an amount of electrical energy. The circuit in the middle converts between the battery charge/discharge voltage levels and the required input/output voltage levels. In modern devices the DC to DC conversion will be well over 90% efficient.

        • eug on 16/03/2015 - 11:41

          The efficiency rating is misleading too. You need to convert the capacity to Wh before applying the efficiency figure, so it's not just a matter of multiplying 2650mAh by 90%.

          In this case if we use a 90% efficiency figure, the actual capacity at 5V would be 1765mAh. The efficiency also varies based on discharge current.

          https://www.ozbargain.com.au/node/176857#comment-2467469

        • twister292 on 16/03/2015 - 14:29

          It is about battery and output differences to quite an extent. For example, 2650mAh at 3.7v (which is the voltage for batteries like the 18650 used in many power banks) is 9.8Wh. A phone draws out 5-5.3v to charge…At 5v, 9.8Wh will be 1960mAh.

          Factor in the inefficiencies and losses, and you're looking at about 1800mAh at 5v or thereabouts.

        • eug on 16/03/2015 - 16:40

          @twister292:

          Factor in the inefficiencies and losses, and you're looking at about 1800mAh at 5v or thereabouts.

          Let's also not forget the efficiency of the charging process. I measured about 95+%efficiency with my tablet. The waste energy is why our phones get warm while charging.

        • gizmojo on 17/03/2015 - 05:54

          @twister292:

          Yes, a mAh rating can not be considered in isolation of voltage. A battery mAh rating is only a "capacity" in reference to the battery discharge profile producing it; where voltage, current, time and temperatures are all factors.

          The 5V USB interface voltage is not normally relevant. A battery capacity (mAh rating) is normally given for the battery alone and that also applies to phones. To charge the phone from a power bank, there is a conversion TO USB voltage at one end and FROM USB voltage at the other end. The intermediate voltage of the 5V USB interface is cancelled out.
          ie.
          [Power bank battery discharge —> circuit —> USB interface —> circuit —> phone battery charge]

           ...equates to...

 [Power bank battery discharge --> circuit --> phone battery charge]
  • frente69 on 16/03/2015 - 09:19
    +2

    Does this retain charge like the AA's? So I could just charge it an leave it in an emergency pack for a year or two?

    I have been looking for something portable which i can charge and then forget about for a good while and then one day when it need it it's ready to go.

    • GaelicAU on 16/03/2015 - 09:56
      +1

      Yep - good question. I'd like to know this too.

      • adamwf on 16/03/2015 - 10:24
        +1

        Being Lithium Ion it should hold its charge pretty well. But it will also depend on the quality of the cells. Usually around 1-3% discharge per month I believe. But will also depend how it is stored etc

        • Russ on 16/03/2015 - 11:32

          It's not just the battery's self-discharge that you have to worry about. This device is better than most power banks, because it has a power switch. Does this switch totally disconnect the battery? Or does it just switch disable the step-up supply that converts the battery's voltage to 5V, while leaving the charger circuit connected? Even the best charger circuits still have some drain on the battery, when the input supply is disconnected.

          If you want certainty (for your emergency pack), buy a power bank with a removable battery. Charge the battery, remove it from the charger, and keep the two separate in your emergency kit.

          Here's such a power pack (comes WITHOUT battery, you'll have to purchase that separately). Note that I have no experience with this model, it's just an example:
          http://www.buyincoins.com/item/38098.html

          Also, with this type of power bank, there is no need to limit yourself to one battery. Want three times the capacity? Buy three batteries, and use them sequentially.

          Do be careful HOW you store your 18650 batteries though, I recommend buying a proper case for them. Don't want them shorting on something else in your emergency pack.

        • frente69 on 16/03/2015 - 11:39

          So maybe just buy a power bank that takes AA batteries and leave a few packs of eneloops in with them?

        • Russ on 16/03/2015 - 19:20

          @frente69:
          That's an option, but heavier and bulkier than 18650 batteries. One 18650 has roughly the same energy as three AA Eneloops, and three AA Eneloops will be roughly three times as heavy as a single 18650.

          However, if you carry a load of loose lithium batteries onto a plane, you might be targeted as a possible terrorist. Airlines are worried about lithium batteries now, probably there will be restrictions in the future. Unlikely NiMh batteries will face any restrictions, other than carry-on weight.

  • helmutiffe on 16/03/2015 - 10:14

    Hey, it can recharge from a Qi wireless pad. That's kind of neat. If the shipping weren't such a large proportion of the purchase price I'd grab one right away.. looking for other good deals on the DSE site and coming up a bit blank :(

  • devinadalovely on 16/03/2015 - 10:16
    +1

    I bought a 50,000 mAh on ebay for $25 approx coming from China but it didn't work! I charged it for the required time but when I plugged my phone in nothing happened and the flashing lights went out. I got my money back and made them pay the postage! They begged me not to leave negative feedback but I won't lie to other Ebayers.

    I don't think it's worth buying less mAh than 50,000 as they do trickle very slowly and don't charge the phone in my experience(a cheapie a couple of years ago). The instructions didn't say how much of a charge you get and had to ring them to find out it only gives a small charge. Must have been low mAh.

    They should have stated that on their ad.I berated them for not giving sufficient information but they wouldn't take responsibility for their inferior product.

    It was expensive as well and I threw it out as the warranty had expired.

    Has anyone used a 50,000? What results? Is it better to pay more for a branded one?

    I would use it for long flights/holidays overseas for phone and e-book.
    Thanks,

    • Domingo on 16/03/2015 - 11:26
      +2

      Most power banks use some kind of cell like an 18650: example

      These batteries typically have capacities in the 2200-3400 mAh range.

      To get a 50,000mAh one you'd be looking at a minimum of ~15 of these cells, if they are the expensive high capacity type. This is going to be bigger and heavier than most laptop batteries: example
      Once you add circuitry and a case, you're going to have a very large and heavy device. It's pretty unlikely that a standard consumer grade product is sold at this capacity and if it is, it's going to be quite expensive.

      A typical phone battery these days is in the 2000-3000mAh range. Once you factor in losses for 3.7v to 5v conversion, then the losses from the charging circuit and across the connectors/cables plugging the batteries into the phone, you'll need a bigger powerbank than the same size as your phone battery for a full charge.

      I generally carry a 5200mAh Romoss Sailing 2 with me because it is small and pretty light. It gives me OnePlus One around 1 full charge (~3000mAh battery)

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