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battery_technology [2007-07-16 17:06] – nik | battery_technology [2015-12-08 12:00] – timbo |
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trickle charger However, since NiMH batteries are so very sensitive to overcharging, the best approach is to use a very low current in order to minimize overcharge damage. One frequent poster to the bikecurrent mailing list uses a charger that charges at a rate something like C/60 and has had good results with it. C/60 is the capacity of the battery in amp-hours divided by 60. So if you had a battery with capacity 4 amp-hours (4000 mAh), C/60 is 67 mA. At this current rate, the battery would be charged from empty in about 84 hours, i.e. about 3 and a half days. | trickle charger However, since NiMH batteries are so very sensitive to overcharging, the best approach is to use a very low current in order to minimize overcharge damage. One frequent poster to the bikecurrent mailing list uses a charger that charges at a rate something like C/60 and has had good results with it. C/60 is the capacity of the battery in amp-hours divided by 60. So if you had a battery with capacity 4 amp-hours (4000 mAh), C/60 is 67 mA. At this current rate, the battery would be charged from empty in about 84 hours, i.e. about 3 and a half days. |
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| ===Recovering Batteries=== |
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| There are techniques to restore batteries, in particular lead-acid batteries, that are beginning to lose power. The main problem seems to be that they develop a layer of crystals that blocks power. The capacitive chargers that use a capacitor to limit the amps that can flow to a battery seem to pulse the layer off the batteries. |
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| They can be purchased: http://www.ebay.com/itm/230728215960? |
| Here is a longer [[http://makezine.com/2013/03/27/how-to-recover-a-sealed-lead-acid-battery/|make discussion]] that talks about ups and downs. |
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| The other main technique seems to be based around using chemicals to free the plates from the crystal layer. Epsom salts for instance. |
| Some resources: |
| http://www.warriorforum.com/off-topic-forum/525296-battery-trick-really-works.html |
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| December 2015. We (TU) have ordered a Da PIMP (Power In My Pocket) charger / pulser / desulphater from [[http://store.holyscraphotsprings.com/|Holy Scrap]]. We took the kit, so we need to follow the [[http://www.instructables.com/id/DP2-Da-Pimp-2-Assembly-Instructions/|instructions]] to assemble it. Some [[http://mikeysklar.blogspot.co.at/p/da-pimp-battery-desulfator.html|Instructions]] too. We will test it on several car batteries, notes to follow. We do not know what this sulphination really looks like. But I suppose we will learn. |
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| This [[http://www.recovermybatteries.com/index.html|product]] from the UK also looks good. And has a bit of a whinge about these "older" products. Let's see what the PIMP does. Perhaps the UK product is actually more appropriate! |
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Libarynth > Main Web > BatteryTechnology r5 - 07 Jul 2004 - 13:17 | Libarynth > Main Web > BatteryTechnology r5 - 07 Jul 2004 - 13:17 |
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