Topic: Impact NPF-F975 / 722 First Battery test results.

[dennisrtyler]

I have had no issues with the lenmar 7800s picked up a couple of those off of thomas distrubuting and dont have the issue with the pins coming out like I did in my impacts

plus the lenmars have a 3 year warranty

[OOK]

I have had no issues with the lenmar 7800s picked up a couple of those off of thomas distrubuting and dont have the issue with the pins coming out like I did in my impacts

I got these too and love them.  Still real new.  3 year warranty, that says something to me........


OOK

[Brian Skalinder]

dont have the issue with the pins coming out like I did in my impacts

Interesting.  I don't recall seeing any complaints about pins with Impact batts, though I probably just missed it.  Good to know, Chris, thanks for sharing.  Fortunately, I haven't had any problems with mine.  Here's hoping no one else does in the future, either!  I didn't even realize Lenmar made these batts.  I wonder if a bunch of the non-Sony batts are all just re-branded from the same factory.  That surely seemed the case with some of the 9v li-ion batts like Lenmar, Initial, etc.

[mmedley.]

I really think the pin issue coming out on batteries mostly lies in new SD units. I think once they get slightly worn from repeated cycling the male pins on the SD become slightly smaller in diameter. I have not had it happen since the first year of ownership and honestly don't know of anyone lately with an older unit experiencing this either. May or may not be true, but my observation.


The Lenmars are nice batteries too. They are slightly cheaper and come with a better warranty. I will try one out next time I order a battery.


Still a big fan of the Impacts though too.

[gewwang]

My impact is still going strong since getting it in Nov 2006. A 2 - 2.5 hour show takes the battery from a full charge at 8.0 on the meter to 7.3-7.5. However, the case is falling apart. I'm holding it together with electrical tape which is doing the job.

[F.O.Bean]

http://www.bhphotovideo.com/c/product/465330-REG/Impact_NPF975_NP_F975_Lithium_Ion_Battery.html

+T

[dennisrtyler]

http://thomasdistributing.com/shop/lenmar-lis970p-72-volt-7800mah-batterybrrechargeable-lithium-ionbr-replaces-sony-npf950-npf960-and-f970b-p-1255.html?SP_id=&osCsid=e5mvh6hf2q45s33mfn09gb9qb2

[dactylus]

http://thomasdistributing.com/shop/lenmar-lis970p-72-volt-7800mah-batterybrrechargeable-lithium-ionbr-replaces-sony-npf950-npf960-and-f970b-p-1255.html?SP_id=&osCsid=e5mvh6hf2q45s33mfn09gb9qb2

+T

[RobertNC]

Given that the battery performed with obviously a less tha full charge,even after the SD722 charger "thought it was completely charged" whem  it clearly was not, and also given that a complete single deep discharge, recharge cycle really altered the battery performance, I think this best explains my empirical observations:

"Although lithium-ion is memory-free in terms of performance deterioration, batteries with fuel gauges exhibit what engineers refer to as "digital memory". Here is the reason: Short discharges with subsequent recharges do not provide the periodic calibration needed to synchronize the fuel gauge with the battery's state-of-charge. A deliberate full discharge and recharge every 30 charges corrects this problem. Letting the battery run down to the cut-off point in the equipment will do this. If ignored, the fuel gauge will become increasingly less accurate. (Read more in 'Choosing the right battery for portable computing', Part Two.) "

http://www.batteryuniversity.com/parttwo-34.htm