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Battery Charger Capacity Question
I bought a Lenmar Pro32A charger and a 20 pack of 2500 capacity AA
batteries. The charger says to use with batteries with up to 2300. If I put in higher-capacity batteries, will it fully charge them but take longer, or charge them to less than full capacity, or will something else happen? |
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Battery Charger Capacity Question
They will explode.
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Battery Charger Capacity Question
This is why you should leave comedy to the professionals.
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Battery Charger Capacity Question
They will charge fine, but just take a bit longer
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#5
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Battery Charger Capacity Question
Shaun Eli wrote:
I bought a Lenmar Pro32A charger and a 20 pack of 2500 capacity AA batteries. The charger says to use with batteries with up to 2300. If I put in higher-capacity batteries, will it fully charge them but take longer, or charge them to less than full capacity, or will something else happen? This charger will cut-off charging after 240 minutes. The charge current with 4 AA cells is 700mA. So after three hours, a fully-discharged battery would be up to 2100mAH. So no, the charger will not charge them to full capacity if they were fully discharged (which is unlikely). Worst case, you'd have to remove and replace them, or unplug then plug in the charger, to reset the timer for another 240 minutes. This is a rather common problem with older chargers, they didn't account for high capacity batteries that would need more than three hours to fully charge. But since most people don't fully discharge their batteries prior to charging, it's not an issue that you have to worry about that much. Personally, I'd return this charger, as it's not a good charger. |
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Battery Charger Capacity Question
I bought the 2500's also . They will not charge . I'm returning them to Buycom . The resistance is far too high to take a charge . I started at .6 amp but they soon warmed too much , i reduced til finnaly at .2 amp they still overheated . I use volts as an approx' of charge state so i can quickly toss them in the "recharge" bin , ready for the next time . These lenmars won't hold a charge for 24 hours ! The volts drop to 1.34 !! 1.38 is a very good nimh battery , 1.365 will work well . I bought a VideoCam JVC 30GigaByte HDD and a Minolta Z-6 . The Z-6 must not use LCD or you will replace rechargeables every 15 minutes ! And FORGET non-chargeables ! They have so much resistance , you'll get half the 3 amp hour they claim ! The batt' must be able to source ( as a test ) at least 1 amp to work in the Z-6 . The Lith-ion in my "77" JVC is much lower ohms than nimh so it works well and i can get the full life before recharge . It you discharge a cell faster than recommended , it's life is shortened . The gel'd sulphuric acid cells used everywhere today for PC UPS and emergency lighting draw far more current , thus reduce the life ... Its for the gel , it simply can't react chemically fast enuf .. An aircraft starting Nicad ( wet cell ) has some of the lowest ohms of any battery made and it's lighter than a car battery . hopefully someday Lith-ion's will come down in price .... BTW anyone know where i can download street maps of bigger US cities . i'm trip planning and my s/w here is Linux /conquerer ( borrowed from frnd) and it crashes and stops responding , so i can't do Yahoo,mapquest, et al ) |
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Battery Charger Capacity Question
Longer ? Good batteries charge in short time , bad batt's take longer and most important will not have the capacity , but are sold anyway with your "fine" excuse ... The old NiCad "mem" fable was actually charging at a rate so low the plate material had a much diff' ohms path , thus reducing the electrons in the higher ohms areas . Pulse chargers fully charge Nicads COMPLETELY . But if the nicad is bad , it will heat at much lower currents Good batt's will have C charge rates like .8 amp . All good batteries will charge in 3hours and less than 200% "recharge" |
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Battery Charger Capacity Question
You must not charge by time ,only temp compensated voltage or the temp itself . Philips long ago used the falling temp . Temp rises slowly , then gasses ( steeper rise ) then it falls ! as it gasses ! . I prefer the rising Temp and pulse charging . Temp rise is loss of battery material ( this is bad ) . If you take it out off the charger and it's too hot to hold comfortably toss it , it will not hold a charge . |
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Battery Charger Capacity Question
On 29 Apr 2006 06:13:56 -0700, Shaun Eli wrote:
I bought a Lenmar Pro32A charger and a 20 pack of 2500 capacity AA batteries. The charger says to use with batteries with up to 2300. If I put in higher-capacity batteries, will it fully charge them but take longer, or charge them to less than full capacity, or will something else happen? No way to know for sure without the manufacturer's literature, but a guess would be that the charger has a timer that either shut off the charger or switches to a trickle charge after the amount of time it would take to charge completely discharged 2300mAh batteries that are in good condition. If that's the case, then all batteries (2300, 2500, 2700 and larger) should appear to take the same amount of time to charge, when in fact the higher capacity batteries haven't been fully charged. Another indicator that the charger has cut off early might be if the charger has an LED or LCD display for each cell, and they all finish charging at the same time, since even closely matched cells won't all finish charging at exactly the same time. One way to deal with this would be to stop the charge cycle well before the NiMH cells have been fully charged and then restart the charger. This shouldn't be done unless the cells are almost fully discharged to begin with, as resuming charging when any of the cells might have previously finished charging could shorten their lives. |
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Battery Charger Capacity Question
I emailed the company and they wrote back the next business day,
explaining that the charger is limited to charging 2300 (AA) and 850 (AAA), but that another eight hours of trickle-charging would bring the batteries up to full capacity. He also mentioned that I could charge them twice, but after the first charge that wouldn't be necessary because it's unlikely that I'd be trying to charge a fully-depleted battery anyway. We exchanged several emails as I had more questions, and I'm very happy with the customer service response I've gotten from the company that makes a ten dollar charger. Shaun Eli www.BrainChampagne.com Brain Champagne: Clever Comedy for Smart Minds (sm) Brain Champagne-- now with a comedy video on the website (six minutes; clean-- no profanity, no adult topics) |
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