PROCELL Constant D Cell Long-Lasting Alkaline Batteries (72 Pack), 10-Year Shelf Life, Bulk Value Pack for Consistent Moderate Drain Professional Devices

Product is good cost for the quality of the product.

This work well in my game cameras year-round in Western Oregon weather.

Purchased this large box of batteries for a family camping trip. Everyone was able to depend on their flashlights, RC cars & other toys for the entire 3 day weekend. And the batteries continued to work after the camping trip.

I have just compared the product data sheets for the Duracell Coppertop MN1300 and the Procell by Duracell PC1300. These are both 1.5-volt, D-size, Alkaline-Managanese Dioxide batteries made by the same manufacturer. They have similar overall operating characteristics, but THEY ARE NOT THE SAME.Before getting into the details, I'll give you the bottom line: Under cold conditions, the Procell will probably perform considerably longer, maybe as much as 50% longer. At room temperature, the Duracell should perform somewhat longer, perhaps 16% longer. But be warned that these numbers depend on a lot of variables. To know how they'll work for you, you've got to look carefully at the application.WHAT DETERMINES BATTERY LIFEThese products have been tested under controlled laboratory conditions, and the results are shown in the charts included in the manufacturers data sheets. If you don't spend the time to read beyond the overview chart at the top, you may conclude that the batteries are identical. They are not. Rather, as the spec sheets warn us in red ink: “Delivered capacity is dependent on the applied load, operating temperature and cut-off voltage.”Now, most users do not know their applied load, and they may or may not know the temperature and cut-off voltage they are looking for. Yet, these factors can have a very large effect on performance, and weigh heavily on which is the right battery type for you.AN EXAMPLE THAT FAVORS PROCELLLet me try to make this clearer by describing an application that I have for the D-cell batteries. I use four of these in a battery-powered ozonator that my wife likes to keep in the refrigerator to reduce odors. Although I have a fairly good idea of the operating temperature. I do not know the current drain.I know from experience that when the ozonator starts flashing red, indicating a low-battery condition, the batteries test at about 1 volt. If I examine the charts for a constant current drain of 250 mA (milliamps}, the fall-off to 1 volt occurs at approximately 46 hours for the Coppertop. The fall-off to 1 volt for the Procell occurs at approximately 43 hours. So there is a difference, amounting to about a 7% longer life for the Coppertop. As my batteries seem to last about 3 months (2,160 hours) in this application, I assume that either the current drain is much less than 250 mA and/or that the device cycles on and off, so the drain is not constant. There is no chart for this, so it remains an assumption that the Coppertops might last longer under my operating conditions. And I can add that my “gut feeling,” after changing to the Procells for two operating cycles, was that the Coppertops were probably outlasting them.However, another comparison of charts, those showing the service hours at constant temperature at 250 mA, gives the advantage to the Procell. My refrigerator is kept at 37ºF (2.8ºC), so the charts for performance at 0ºC are fairly applicable. At this temperature, the fall-off to 1 volt for the Coppertop occurs at approximately 16 hours. For the Procell it occurs at about 24 hours. This is a huge advantage for the Procell, amounting to 50% longer life!This might explain the experience of reviewer D. McLauglin (“Solid Product!” on August 10, 2011) who compared the performance of the Coppertops to the Procells in two identical trail cameras, and found that the Procells outlasted the Coppertops by 4 weeks in a test of several months duration. McLauglin did not keep a continuous recording of temperature, but he says that the cameras sat through snowstorms as well as rising and falling temperatures. If he had used them under summer conditions, he might have found different results. He also didn't try a second test in which the cameras were exchanged, in order to eliminate the possibility that one device drew more current than the other. But he is certainly to be praised for running a months-long test, and a far more scientific one than I have yet tried.A DIFFERENT EXAMPLE THAT FAVORS COPPERTOPBut don't jump to the conclusion that the Procell will give you a longer service life if you are planning to use it at room temperatures. When compared at room temperature (21ºC/70ºF), the Coppertop has the advantage—about 46 service hours, compared to 43 hours for the Procell to reach the 1 volt level. And if your application allows you to drain the battery down to 0.8 volts, the Coppertop has a little further advantage, reaching 0.8 volts after 50 hours, while the Procell has drained to 0.8 volts in 43 hours. That gives a 16% advantage in service life to the Coppertop. But remember that these are the service hours for continuous current drain at 250 mA. What if your current drain is different. And what if, as often happens, it is intermittent and not continuous? Does it get better or worse for the Coppertop? We don't know.. . . AND THE PRICE CONSIDERATIONSo you see, it is not possible to give a one-size-fits-all answer to the question of which battery is better. And of course, price must be taken into account. Presently, the best deal I can find on Amazon for the Coppertop D battery is in an 8- pack for $16.19, or $2.02/count, with free (but not Prime) shipping. The Procell D battery comes in a 12-pack for $14.48 or $1.21/count (with Prime shipping). This gives a vast price advantage to the Procell in the Size D battery. And for many uses the Procell will prove equal or superior to the Coppertop. But for some applications, the longevity advantage will go to the Coppertop, and if more frequent changing of the battery is an issue, that might be the better choice.To sum it all up: Despite my “gut feeling” about the Coppertop advantage in my refrigerator application, my research now suggests that the Procell D battery is not only much cheaper, but probably considerably longer lasting for this specific application. For use at room temperature, the Coppertop will have a slight advantage, but after price is taken into account, the scale still leans toward Procell.REFERENCES: Spec sheets used for this analysis are MN13CTUS0413 for the Coppertop, and PC13US1214 for the Procell.

I have had excellent results using Duracell Procell batteries in many of my devices now since they came on the market. I use them in my trail camera last fall into the winter in below freezing temperatures of the North East Mountains of N.H. The continue to power the camera taking thousands of picture with little signs of wearing down. I still have the same set if D batteries in the camera this season and the power meter shows 60% power bar left, I plan to replace them this season and will use the remainder in a flashlight or other device so I dont miss any good shots of a trophy buck passing by. I Use them in my LED head lamps, flash lights and even in a battery operated water pump to draw water from 5-gal spring bottles and fire alarms. The batteries have excellent life in all my equipment even when comparing to the other big brands and none have out lasted the Procell so why pay the extra. I also use the rechargeable Duracell batteries in my Garmin hand held GPS and they actually stay charged even when sitting for since last season that is just amazing they would even power on after several months of sitting. I recommend if you have not tried these buy a some and give them a try you may be surprised.

We keep a stock of batteries of all sizes and these seemed a good price. We first tried the "C' and found them to very good. They last reasonably, so we ordered other sizes, including these Ds. They arrived quickly with some other items we ordered, we have prime.Further, I did NOT receive compensation of ANY kind for my review. My purchase is VERIFIED, full price, unsolicited, honest and 100% independent. As are my reviews. My reviews are completely my opinion, which may differ from yours. I respect that. I do my best to offer real, honest reviews to help other buyers. Happy shopping to all!

I'm always skeptical about claims of long life in batteries. Like most consumers, I'm pretty tired of having to buy and replace batteries nearly constantly. D cells just don't seem to be very popular in the rechargeable market, so when we needed to buy a swing for our baby girl, my husband and I both just sighed and resigned ourselves to yet another device which requires constant battery replacement. I purchased these and I am more than pleasantly surprised. While the batteries that came with the swing lasted about 2 weeks, these have been in the swing for 6 weeks now and haven't needed replacement yet. The swing is showing no signs of slowing down, and that is a very good thing!They also aren't much more expensive than other batteries, and are certainly less expensive here than even regular batteries at an electronics store.These are awesome batteries, and a very good buy.

I recently replaced the batteries in my Melodies in Motion musical wall clock (reg. Duracell Copper Top). Less than 3wks later, the spinning wheel started acting funny--stopping/starting/groaning, I KNEW it had to be the batteries, even though they were BRAND NEW. I decided to try these and now my 11yr old clock is working perfectly again. I was initially concerned, that maybe it was just old and time to replace. But NO, it was defective batteries. From here on out, I will ONLY use the ProCell brand and stop wasting my money. These are a great value for the price, considering I spent about $8, for 4 of the useless ones.