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La Crosse Technology BC700 Alpha Power Battery Charger $27.99 (24.48 now :)) shipped @ Amazon Archived From: Hot Deals

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nanomedia said:anyone found a filler?

here :)


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These are fantastic. In for 2!


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placed the order, used this spoon as a filler


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nanomedia said:placed the order, used this spoon as a filler

Espresso Supply 8-Inch Spoon ???


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Couldn't resist any longer...gotta have one!
Got it for 25.31 with this filler.

Thanks OP!


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I've tried the Full Refresh but after more than 36 hours the display wasn't showing FUll yet, is it supposed to take that long to refresh 4 AA 2300mah?

Also, what's NULL means when you insert batteries?


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Mawashi said:I've tried the Full Refresh but after more than 36 hours the display wasn't showing FUll yet, is it supposed to take that long to refresh 4 AA 2300mah?

Also, what's NULL means when you insert batteries?

null means the batts are at such a low level state usually .5v or less so the charger won't detect/charge them. I have been able to put "null" batts in a cheap timer charger (or another computer controlled charger like the Vanson Speedy box) and recover it enough that it will be detected and charge in a lacrosse bc-900. good luck.


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Mawashi said:I've tried the Full Refresh but after more than 36 hours the display wasn't showing FUll yet, is it supposed to take that long to refresh 4 AA 2300mah?

Also, what's NULL means when you insert batteries?


edited: sorry double post.


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Mawashi said:I've tried the Full Refresh but after more than 36 hours the display wasn't showing FUll yet, is it supposed to take that long to refresh 4 AA 2300mah?

Also, what's NULL means when you insert batteries?

jump start such batteries in any cheap charger - to get some juice flowing - this charger thinks this battery is dead - cause it's empty beyond recognition!!!


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Got it for the NULL message, thank you! Should it takes more than 48 hours to do a full refresh of 4 AA 2300mah?


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Yes it can take a long time to refresh a poorly conditioned battery. It will run the charge/discharge cycle up to 20 times, or until the charge capacity of the battery levels out. It sounds like your batteries are increasing their capacity enough with each cycle that the Lacrosse continues to run the refresh cycle. At a slow-charge 200mA rate, figure it takes 10 hours to fully charge a battery, plus another hour or two to discharge. If each cycle takes about 12 hours, that's 10 days for 20 refresh cycles (most batts don't need nearly that many).


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$25.99


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Beersy said:I own the BC-900 and my father-in-law has the BC-700. Truthfully, I wish I had saved my cash and just bought the BC-700. I have a cheap quick charger if I just need to quickly charge a battery before heading out the door. Otherwise my BC-900 (which I use 99% of the time) I run at 500mah at all times. It works great. One of my Energizer 2500mah batteries only tested at 1095mah and after doing a refresh I was able to get 2340mah out of it (obviously your milage may vary). It also has fixed my problem in that I use Rayovac Hybrids for my Wii remotes and after some time of getting the pairs mixed up I wasn't able to get them fully changed (cheap chargers only change until 1 of the batteries is fully changed). This was causing a problem in that every time I put a "recharged" set into my remote, it would only show 2-3 bars. Now I have solid 4 bars every time since all batteries are being fully charged!

The La Cross BC-Family is the only way to go.

Oh as one other posted started, my bag, batteries, and battery sleeves are also just sitting in a drawer. I have never used them. I use low-discharge 90% of the time (other than my A570IS which is a battery hog and needs all the power I can give it).

I have the A590IS and the BC-700. My Eneloops don't last at all in my A590IS so I am forced to use freshly charged Mah2500 batteries. I thought the camera was defective at first because my older A540 lasts so much longer. I highly recommend the BC-700 and if you have enough rechargable batteries you can live with the slow 200mah charge.


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got one for 25.99 + FS. Thanks!


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Ordered one for a friend not realizing the price was good on the 13th. Decided to go with 3 additional ones for me (we have four boys, 50 LSD AA batteries to charge) to add to the 900 that I have now. Thanks for bringing this back to the top.


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Is there a good charger that does C, D, AA, and AAA in one unit?


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jangell2 said:Is there a good charger that does C, D, AA, and AAA in one unit?

use C & D adapters! Good luck!


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OOS while I looked at something else


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peas said:Yes it can take a long time to refresh a poorly conditioned battery. It will run the charge/discharge cycle up to 20 times, or until the charge capacity of the battery levels out. It sounds like your batteries are increasing their capacity enough with each cycle that the Lacrosse continues to run the refresh cycle. At a slow-charge 200mA rate, figure it takes 10 hours to fully charge a battery, plus another hour or two to discharge. If each cycle takes about 12 hours, that's 10 days for 20 refresh cycles (most batts don't need nearly that many).


Thank you for the explanation peas!


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Mawashi said:peas said:Mawashi said:I've tried the Full Refresh but after more than 36 hours the display wasn't showing FUll yet, is it supposed to take that long to refresh 4 AA 2300mah?...Yes it can take a long time to refresh a poorly conditioned battery. It will run the charge/discharge cycle up to 20 times, or until the charge capacity of the battery levels out. It sounds like your batteries are increasing their capacity enough with each cycle that the Lacrosse continues to run the refresh cycle. At a slow-charge 200mA rate, figure it takes 10 hours to fully charge a battery, plus another hour or two to discharge. If each cycle takes about 12 hours, that's 10 days for 20 refresh cycles (most batts don't need nearly that many).
Thank you for the explanation peas!

Mawashi,

At such a SLOW charge rate (2300mah @ 200ma = 0.087C), it going to take MUCH longer than peas stated. Figure on:

  • Charge: (2300 / 200) * 1.6 = 18.4hrs (some charge turns into heat) - notice, if the BC-700 / BC-900 could provide 230ma (Industry Recommended Standard 0.1C, based on 16hrs timed), it would be:
  • Charge: (2300 / 230) * 1.6 = 16.0hrs (some charge turns into heat)
  • Discharge: (2300 / 100) * 0.8 = 18.4hrs (not all capacity can be retrieved)
  • 1 Cycle : 36.8hrs ( 1.53 days)
  • 20 Cycles: 736.0hrs (30.67 days)
At the Industry Recommended Minimum 0.5C (based on '-Dv') charge rate (2300mah * 0.5C = 1150ma), it could take:
  • Charge: (2300 / 1150) * 1.4 = 2.8hrs (some charge turns into heat) - but, the closest BC-900 rate is 1000ma, thus
  • Charge: (2300 / 1000) * 1.4 = 3.2hrs (some charge turns into heat)
  • Discharge: (2300 / 500) * 0.9 = 4.1hrs (not all capacity can be retrieved)
  • 1 Cycle : 7.3hrs ( 0.30 days)
  • 20 Cycles: 146.0hrs ( 6.08 days)
At the Industry Recommended Maximum 1.0C (based on '-Dv') charge rate (2300mah * 1.0 = 2300ma), it could take:
  • Charge: (2300 / 2300) * 1.1 = 1.1hrs (some charge turns into heat) - but, the closest BC-900 rate is 1800ma, thus
  • Charge: (2300 / 1800) * 1.2 = 1.5hrs (some charge turns into heat)
  • Discharge: (2300 / 900) * 0.8 = 2.0hrs (not all capacity can be retrieved)
  • 1 Cycle : 3.5hrs ( 0.15 days)
  • 20 Cycles: 70.0hrs ( 2.92 days)


Which is why I stated, on Dec 12, 2008:

TakeTheActive said:[OPINION]

Unless the largest cell you plan to recharge is 1400mAh, SKIP THE BC-700!

[/OPINION]
Even at the BC-700s maximum charge rate of 700ma, you'd only be at (700ma / 2300mah = ) 0.304C, where you now risk charging at too slow a rate to produce a clear "-Delta v" detection while still high enough to allow the cell to continue to OVERCHARGE until it reaches either THERMAL detection or TIMER expiration.

Read the LINKs in the Quick Summary of my new thread: La Crosse BC-900 vs Maha MH-C9000

IMHO, BC-700 = "Penny-wise, pound-foolish"...


UPDATE #1:

  • Slow charge rate of 0.1C further reduces efficiency to a 1.6 multiplier, not the originally posted 1.2.
  • Recommended charge rate of 1.0C increases efficiency to a 1.1 multiplier, not the originally posted 1.2.
  • 1.4 multiplier for the recommended charge rate of 0.5C is my guess, based on my 'rough' interpolation.
  • Stated cell capacity is an average, based on a 0.2C discharge rate. For above and below, I'm just guessing at 80%. If I find new numbers, I'll update.


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