SPO 7500 Oximeter Batteries

Nodzy · Post by **Nodzy** » Tue Feb 19, 2008 8:44 am

Sorry about creating a new thread, but this probably shouldn't be buried in another thread anyway,

The 1/2 AA size batteries for the SPO 7500 are not generally a drugstore stock battery, and surely not at a low price.

Many variations of this battery exist. Some have soldered wire leads, others have soldered tabs and some are standard button slip-in batteries.

The SPO 7500 uses only the standard slip-in style, button-top 1/2 AA battery. Do not risk your face and eyes by trying to buy cheaper versions with soldered tabs or wires and attempt to modify the battery for use in the SPO 7500. Eyes are precious.... don't risk yours.

I do not currently own or use an SPO 7500, and have not ordered 1/2 AA batteries from the places listed below. Though I have previously purchased from the vendors.

A few places where the 1/2 AA batteries can be obtained for less:

http://shopping.microbattery.com/s.nl/i ... egory=3845
HIGH rating at http://www.resellerratings.com

Low cost and very low shipping cost. Buy one or more at a time -- EXAMPLE: Six XENO XL-050F 1200mAh 1/2 AA batteries shipped to your door costs $25.95.

http://www.cyberguys.com/templates/Sear ... uctID=1347
HIGH rating at http://www.resellerratings.com

Moderate-low cost and moderate-high shipping cost. Buy one or more at a time -- EXAMPLE: Six SAFT LS14250 1200mAh 1/2 AA batteries shipped to your door costs $44.13.

Nodzy

Pirateghost · Post by **Pirateghost** » Tue Feb 19, 2008 10:06 am

Thanks, good info.

Gerald · Post by **Gerald** » Tue Feb 19, 2008 10:24 am

Amazon offers the batteries for the 7500......sourced through Cyberguys. My order for batteries went smoothly. Over the years, I've purchased other stuff from Cyberguys........and they're nice to deal with.

Gerald

roncron · Post by **roncron** » Thu Feb 21, 2008 8:55 am

Thanks Nodzy & Gerald. This is very useful information.

-Ron

paloa · Post by **paloa** » Fri Feb 22, 2008 6:57 am

I just purchased 10 batteries from http://www.batteryJunction.com for 35.93 (including shipping) using discount code newyear2008 (5% off I think). At 10 the price per battery drop.

http://www.batteryjunction.com/xeno-1-2 ... -3-6v.html

This is the second time I have been happy with my order from batteryjunction. Both were shipping promptly. (pulseox batteries ordered 2/18 arrived 2/21)

Other than being a customer in the past I have no relationship with batteryjunction.com

Nodzy · Post by **Nodzy** » Fri Feb 22, 2008 8:22 am

Paloa,
That's great... not a bad price.

But from http://shopping.microbattery.com/s.nl/i ... egory=3845
you could have had ten (10) 1/2 AA XENO 3.6-volt 1200mAh batteries shipped to your home for only $32.45.

Personally, for an equal item from a reputable supplier... I have no aversion to saving $3.48. After all, that much will still buy a gallon of gas in most USA locations, but probably not for much longer... <sigh>.

Good luck, and I'm glad you're pleased with your purchase.

Nodzy

6PtStar · Post by **6PtStar** » Fri Feb 22, 2008 2:54 pm

I thought "I won't use it enough to need ten batteries so I tried Radio Shack. Yea they had it. one battery $16.99 plus tax = $18.39. Ouch! I guess I can order more than one.

Jerry

mindy · Post by **mindy** » Fri Feb 22, 2008 3:01 pm

With Cyberguys if you sign up with them you'll get a 5% discount off their advertised prices.

Mindy

Nodzy · Post by **Nodzy** » Fri Feb 22, 2008 4:00 pm

Mindy... good point,

But I'm still baffled about how that 5% discount, deducted from their higher per-battery cost and higher shipping rate..... can beat the lower cost per-battery and much lower shipping cost of the 1/2 AA XENO 3.6-volt 1200mAh XL-050F batteries from http://www.microbattery.com .

Maybe I woke up on the wrong side of the calculator buttons this morning.

Oh, and I have NO affiliation with any online businesses.

Nodzy

paloa · Post by **paloa** » Fri Feb 22, 2008 6:24 pm

Sounds like microbattery would have been a better deal.

Even if I would have found the lower price (I ordered them before I found this thread) I probably would have made the same purchase. Buying from internet vendors is a risk, even buying from a highly rated vendor. I feel better buying from someone that I have had a previous positive experience.

Thank-you for posting these sources. I spent a fair amount of time sorting through the different versions of these batteries. If my timing would have been better I would have saved time and maybe even money.

Nodzy wrote:Paloa,
That's great... not a bad price.

But from http://shopping.microbattery.com/s.nl/i ... egory=3845
you could have had ten (10) 1/2 AA XENO 3.6-volt 1200mAh batteries shipped to your home for only $32.45.
...
Nodzy

RipVW · Post by **RipVW** » Fri Feb 22, 2008 7:29 pm

Has anyone had to change their 7500 device battery yet? The company says they last 300 hours, guessing that's an exaggeration. Haven't had to change mine yet, but I'm no where near even 100 hours.

paloa · Post by **paloa** » Sat Feb 23, 2008 7:27 am

I changed mine a couple of days ago. I had trouble uploading and based on a previous thread thought it might be battery related. The problem went away with the new battery. Note the device had not indicated the battery needed changing so it might not have been the problem.

I would estimate I had more than 200 hours but less than 300 hours.

Gerald · Post by **Gerald** » Sat Feb 23, 2008 8:00 am

Paloa..........

I experienced the same problem when I had to change my battery the first time.

As the guy from the SPO factory told me, the nature of that type battery is that the voltage tends to drop off very sharply at the end of its life.

Translated into terms most of us can understand.....this means that the battery indicator is not going to give us a very good usable warning as to when we should change the battery.....because battery failure doesn't happen gradually....it happens quickly.

So, I've learned not to bother looking at the battery indicator....I just change the battery when I have difficulty uploading....and I know that I've got around 300 hours on that particular battery.

I don't consider this a problem....it's just the nature of the machine....part of what I have to know in order to operate it. The electronics of this device need a relatively constant voltage over the life of the battery.....so, the end of a SPO battery's life comes suddenly....not like the old flashlight batteries we're all used to.

Gerald

Nodzy · Post by **Nodzy** » Sat Feb 23, 2008 9:03 am

Generally, any manufacturer estimate of battery life in a product is tilted toward fantasy.

They lab-test under ideal conditions with batteries almost straight off the assembly line. The average consumer buys batteries that have been stored for considerable time, and exposed to temperatures during transport, and possibly during storage, that can drain some life from the batteries.

But even if the SPO 7500 yields only 240 hours of battery life -- with an average of 8-hour nights of usage... that'll provide about a month of O2 monitoring nights per battery. Discounting any other usage of the oximeter for walks, naps etc.

Depending on where you buy the 1/2 AA 3.6-volt batteries, and the volume price-break for quantity, you could have that oximeter usage for about 11-cents or less per 8-hour night. Not bad at all, compared to the cost of operation of many other oximeters.

My Nonin 3100 --
Even with a great price on "N" Cell alkaline batteries bought in two (2) bulk packs of 48-each at a time from http://www.batterywarehousedirect.com costs me about 47-cents per 8-hours of use. It uses two (2) "N" Cells at a time.

The prime influences for my Nonin 3100 purchase were; documented history of longevity and accuracy of the unit, the outstanding 3-year warranty verses the 1-year warranty for most other brands of oximeters, and that I could change or replace the sensor whenever necessary. The sensor or its cable are usually the parts that fail first on any oximeter -- barring drop, crush or liquid damage to the oximeter itself. Whether it was a good or bad purchase... I like the unit and its versatility for my needs.

Though, I am looking into possibly using "N" Cell NIMH rechargeable batteries in the Nonin 3100, and may try them. But it's a sure bet they won't yield but one or two 8-hour nights of use between charges, If they'll even power the unit properly.

Alkaline "N" Cells are 1.5-volt -- at 1000mAh
NIMH rechargeable "N" Cells are 1.2-volt -- at 500-mAh

For the possibility of reducing the battery cost per night by 50% to 70% by using rechargeable NIMH "N" Cells I'll probably give them a try when I deplete my stock of Energizer alkaline "N" Cells.

Nodzy

Humidifier

Additional Comments: Aussie Heated hose, EncorePro, EPA, SPO Medical PulseOx 7500

Machine