What exactly is an Energizer ER-P511 ?

Energizer ER-P511

The Energizer ER-P511 is a cordless telephone battery used in over 200 different mostly Panasonic telephones. Most of the Panasonic Model supported by the ER-PP511 begin with the Prefixes KX-TG and KX-TGA followed by the specific model number. These telephones have many unique features and are GREAT PHONES - most users love them, although battery life has been a persistant problem disappointing many customers. There is, however a solution...

We have provided many details concerning the Energizer ER-P511 battery below. Hopefully this education will give you the knowledge you need to make an informed buying decision when purchasing a replacement Energizer ER-P511 battery pack for your telephone.

What are the specifications of the Energizer ER-P511 battery Pack?

Most Panasonic PP511 batteries are rated at 3.6 volts and between 600 and 1300 mAh (Mili-Amp Hours). Sometimes you will see higher or lower mAh ratings. The mAh number is the measurement of the "capacity" of your P-P511 battery pack. The higher the Mili-Amp Hour rating, the longer your run time. For example, a 600 mAh cordless phone battery will give you twice as much talk time when compared to a 300 mAh (half of 600) battery pack.

What is the typical useful life of a Panasonic P-P511 Battery Pack?

Most consumers get between 3 to 5 years of service out of their Panasonic P-P511 phone battery before needing to replace it. This lifespan absolutely depends, of course, on individual patterns of usage.

But I thought Panasonic P-P511 batteries were rechargeable. Why do they wear out?

True, the Panasonic PP511 battery is in fact rechargeable. Unfortunately, we still have not invented a perfect battery and since there is no such thing as a perpetual motion machine, the Panasonic PP-510 will eventually need to be replaced. Every time you charge and discharge your Panasonic P-P511 battery, a chemical reaction occurs to store or release the electricity to power your cordless telephone. Part of that chemical reaction uses a tiny portion of the NiMh chemistry in your Panasonic P-P511 battery pack. Eventually those chemicals are depleted and your battery goes "dead".

My Panasonic P-P511 battery has a black wrapper. I see different colored telephone batteries available. Is that ok?

Yes, several different companies manufacture and market their own version of the Panasonic P-P511 battery design to consumers. Many times these other battery manufacturers use different colored plastic shrink wrap as part of their own marketing and "branding" efforts. We have seen green, red, yellow, blue and tan to name a few! Rest assured, the color of your Panasonic P-P511 plastic battery wrapping is unimportant. What is important is that the form factor (size), contact (plug),polarity (orientation of the positive and negative contacts) and of course the voltage of your PP511 need to be exactly the same.

How do I make certain I'm getting a quality replacement Panasonic P-P511 battery pack?

Here is where you have to use some common sense and be a wise shopper. Sure, you can find websites selling replacement Panasonic P-P511 batteries at prices from $5.95 to $19.99 for what looks like "the same" (in the pictures at least) Panasonic PP511 battery. Our experience indicates that it is true that you usually do "get what you pay for". In this particular example, there is definitely something wrong with the two extremes. Certainly $19.99 is too much to pay for a Panasonic P-P511 battery. And, in most cases, $5.95 is just too good to be true. We get concerned about the quality of the materials (battery cells), safety features, and quality control process to insure the correct precision fit and finish of the P-P511 battery. One has to wonder - is it a brand new P-P511? Unfortunately there are probably some "refurbished" or damaged goods out there at some of those low prices. In addition many of these low teaser rates do not include shipping or handling charges. Oftentimes that "$5.95" Panasonic P-P511 cordless phone battery ends up being $18.99 or more after the hidden shipping and handling charges are added. So make sure you are looking at the final total price of these "bargains".

What should I look for when buying a replacement Panasonic P-P511 battery?

If you are interested in buying a quality replacement for your Panasonic P-P511 battery, go with a proven company that offers at least a 180 day money back guarantee, a one year no hassle warranty, gives you a toll free customer support telephone number, and clearly identifies the total cost of the purchase including any shipping or handling charges upfront.