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Eneloop purchase...info
I just bought my first set of Eneloops. I have been using two sets
of two Energizer 2500mah in my Sony DSC- H1 The Energizer is a standard NiMH battery that self discharges like all other standard NiMH batteries. ( about 1% per day self discharge ) I charged the two sets of Energizers a week before Christmas. All four measured 1.4 volts directly off of the 130ma slow charger. Upon taking 100 photos on Christmas through today I only have a 1/3 battery indication on the camera with the first set of Energizers. This used set measures about 1.22 volts. The second set of Energizers have sat on the shelf unused and measures only 1.26 volts. They have dropped from 1.4 volts to 1.26 volts in just 10 days. The Eneloops rated at 2000mah measures 1.3 volts right out of the box. They have sat on the shelf for much longer than 10 days.The stated self discharge rate is about 15 times less than a standard NiMH. This should mean that my Eneloops will drop to 1.26 volts in about 5 months instead of 10 days. The gain of minimal self discharge should offset the initial lower capacity in that it should only take about three weeks for the Energizer 2500's to drop down to the 2000mah capacity of the Eneloops. *Also found a great SMART charger at Ritz Camera. A four channel 60 minute charger for 1 through 4 AA/AAA batteries. The charger has one LED for each of the four batteries to indicate independently the state of charge whether it be Rapid-Red /Trickle,finish-Green /Faulty battery-Orange. It is a Quantaray by Sunpak brand charger for only $34 dollars with four standard NiMH batteries. ( I do not work for Ritz ) |
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Eneloop purchase...info
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#3
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Eneloop purchase...info
If you put fully-charged sets of your Energizers and your Eneloops on the shelf and measure their voltage once a week for a couple months, you'll notice that the voltage curve over time is not linear enough to make extrapolations as you did above. You are correct. I went the right direction but I can't quantify the exact numbers. Panasonic R2, Ansman MaxE and others are now also offering low self discharge NiMH batteries. You'll also end up with really interesting data about the actual self-discharge rate of Eneloops. A grateful planet would thank you if you post the results here. (Make sure the new batteries have been through a couple charge/ discharge cycles before you start the experiment.) Storing both types of NiMH batteries in cool places also decreases the self discharge rate. I will keep track of the Eneloops and see if they fare better than the Energizers for random spontaneous use. |
#4
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Eneloop purchase...info
On Thu, 28 Dec 2006 20:16:33 -0500, tnom wrote:
I just bought my first set of Eneloops. I have been using two sets of two Energizer 2500mah in my Sony DSC- H1 The Energizer is a standard NiMH battery that self discharges like all other standard NiMH batteries. ( about 1% per day self discharge ) I charged the two sets of Energizers a week before Christmas. All four measured 1.4 volts directly off of the 130ma slow charger. Upon taking 100 photos on Christmas through today I only have a 1/3 battery indication on the camera with the first set of Energizers. This used set measures about 1.22 volts. The second set of Energizers have sat on the shelf unused and measures only 1.26 volts. They have dropped from 1.4 volts to 1.26 volts in just 10 days. The Eneloops rated at 2000mah measures 1.3 volts right out of the box. They have sat on the shelf for much longer than 10 days.The stated self discharge rate is about 15 times less than a standard NiMH. This should mean that my Eneloops will drop to 1.26 volts in about 5 months instead of 10 days. If it is linear. The gain of minimal self discharge should offset the initial lower capacity in that it should only take about three weeks for the Energizer 2500's to drop down to the 2000mah capacity of the Eneloops. *Also found a great SMART charger at Ritz Camera. A four channel 60 minute charger for 1 through 4 AA/AAA batteries. The charger has one LED for each of the four batteries to indicate independently the state of charge whether it be Rapid-Red /Trickle,finish-Green /Faulty battery-Orange. It is a Quantaray by Sunpak brand charger for only $34 dollars with four standard NiMH batteries. ( I do not work for Ritz ) |
#5
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Eneloop purchase...info
Paul Allen writes:
to make extrapolations as you did above. You'll also end up with really interesting data about the actual self-discharge rate of Eneloops. A grateful planet would thank you if you post the results here. (Make sure the new batteries have been through a couple charge/ discharge cycles before you start the experiment.) This has been done many times and Eneloop's claims appear to be true. Energizer 2500 mah cells made from certain manufacturing batches have also developed unexpectedly fast self-discharge after a few cycles. |
#6
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Eneloop purchase...info
Upon taking 100 photos on Christmas through today I only have a 1/3 battery indication on the camera with the first set of Energizers. This used set measures about 1.22 volts Using the out of the box Eneloops I just took 150 photos with flash on 90% of the time, zoom change 10%, AF illuminator on, LCD on 10%, LCD playback of all of the pics two times and the battery icon shows full and measures at 1.26 volts. |
#7
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Eneloop purchase...info
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