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Evaluating High Capacity Batteries (Part II)

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  1. Evaluating High Capacity Batteries (Part II), Evaluating High Capacity Batteries (Part II): 步骤 1 中的图像 1,3 Evaluating High Capacity Batteries (Part II), Evaluating High Capacity Batteries (Part II): 步骤 1 中的图像 2,3 Evaluating High Capacity Batteries (Part II), Evaluating High Capacity Batteries (Part II): 步骤 1 中的图像 3,3
    • Here is the side-by-side of the batteries. Luckily the batteries have their own markings so they will be easy to identify during this test. Note: Apple symbol on the eBay battery.

    • First step are to measure the physical dimension of each battery. This may seem tedious since it was done for each battery but for the integrity of this test its deemed necessary.

    • First the iFixit battery. Weight is 42.79 gram

    • Length is 108.82

  2. Evaluating High Capacity Batteries (Part II): 步骤 2 中的图像 1,3 Evaluating High Capacity Batteries (Part II): 步骤 2 中的图像 2,3 Evaluating High Capacity Batteries (Part II): 步骤 2 中的图像 3,3
    • Width is 47.90mm with a thickness of 3.38mm

    • Next we have the eBay battery. Weight is 44.02 gram

  3. Evaluating High Capacity Batteries (Part II): 步骤 3 中的图像 1,3 Evaluating High Capacity Batteries (Part II): 步骤 3 中的图像 2,3 Evaluating High Capacity Batteries (Part II): 步骤 3 中的图像 3,3
    • Length is 108.9mm

    • Width is 48.32

    • and a thickness of 3.69mm

  4. Evaluating High Capacity Batteries (Part II): 步骤 4 中的图像 1,3 Evaluating High Capacity Batteries (Part II): 步骤 4 中的图像 2,3 Evaluating High Capacity Batteries (Part II): 步骤 4 中的图像 3,3
    • Now the XCAP battery. Weight is 45.86gram

    • length is 109.54mm and width is 48.87mm.

  5. Evaluating High Capacity Batteries (Part II): 步骤 5 中的图像 1,3 Evaluating High Capacity Batteries (Part II): 步骤 5 中的图像 2,3 Evaluating High Capacity Batteries (Part II): 步骤 5 中的图像 3,3
    • Thickness of the XCAP is 3.62mm

    • Yes, it is boring and tedious but to ensure that this guide compares like to like it is felt to be necessary.

    • For the question on Answers, the batteries were all charged using a “Fast Charging Activation Test Fixture” by Jageud.During those tests the board only managed to charge all three batteries to around 4.09Volt.

    • I did not want to use my lab power supply but wanted to stay with equipment that others may have available as well. As a tinkerer by heart, I opted for an Apple charger as well as an Apple charge cable. I hacked the original 30 pin connector off and determine + and - wires

    • I then connected the positive to positive and negative to negative directly to the prototype board, bypassing any communication etc. from the battery to the charger. Charging was monitored with a USB ammeter. All batteries were charged this way to around 4.24V. It is possible that this is where the battery protection prevents overcharging.

  6. Evaluating High Capacity Batteries (Part II): 步骤 6 中的图像 1,3 Evaluating High Capacity Batteries (Part II): 步骤 6 中的图像 2,3 Evaluating High Capacity Batteries (Part II): 步骤 6 中的图像 3,3
    • Once the ammeter showed that the batteries were no longer accepting a charge, the batteries were checked with a run-of the mill multimeter.

    • eBay battery charged to 4.29V

    • iFixit 4.39V (anomaly)

    • XCAP batter 4.28 V

  7. Evaluating High Capacity Batteries (Part II): 步骤 7 中的图像 1,3 Evaluating High Capacity Batteries (Part II): 步骤 7 中的图像 2,3 Evaluating High Capacity Batteries (Part II): 步骤 7 中的图像 3,3
    • After charging all the batteries I ran a constant current test on all batteries with my ZKETech EBC-A10H analyzer. The software is EB tester Software V1.8.5 All battery tests had the same parameter of a constant current draw of 0.6 Amp and a stop test voltage of 2.9V

    • Results for the eBay battery Device:EBC-A10H Mode:D-CC 0.60A 2.90V Begin Volt:4.246V Cutoff Volt:2.900V Capacity:2778mAh Energy:10.09Wh Avg Volt:3.63V Title:eBay Seller

    • Here is the iFixit battery data: Device:EBC-A10H Mode:D-CC 0.60A 2.90V Begin Volt:4.326V Cutoff Volt:2.900V Capacity:3055mAh Energy:11.20Wh Avg Volt:3.67V Title:iFixit

  8. Evaluating High Capacity Batteries (Part II): 步骤 8 中的图像 1,1
    • Finally the XCAP battery data: Device:EBC-A10H Mode:D-CC 0.60A 2.90V Begin Volt:4.239V Cutoff Volt:2.900V Capacity:3013mAh Energy:10.99Wh Avg Volt:3.65V Title:XCAP

结论

As shown, yes it is possible to get a higher capacity battery, no matter how nominal the result may appear. This is to once more clarify that this is not to call anybody out. Amongst all three batteries there was no dud. All of them delivered “the goods” . The anomaly with the iFixit battery having taking a higher charge may be related to the battery management board. Further investigation will follow by disassembling the batteries to check the hardware on those. Maybe that will shed more light on this. Guide to follow.

Please leave a note on this guide about any comments, suggestions or questions that may arise. I will try to clarify whatever I can.

7等其他人完成本指南。

oldturkey03

于09/29/10注册

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