... the non rechargeable battery situation but there is an easy fix. I have and 18 volt ryo b ...
936615
only problem is the non rechargeable battery situation but there is an easy fix. I have and 18 volt ryo b cordless tool kit I took the flashlight and opened it up and got a cord with the same plug as the cord the comes with a k_m_c 3 and wired the extra cord directly to the + - terminals. (by doing this to your making the place for the battery to easily connect to for recharging or switching batteries when one is dead) went to home depot they had a sale. 2  4amp lithium ion and batteries for $80 or something like that. so now instead of recharging 8 d rechargeable batteries which takes 14 hours and have a run time at high volume for maybe 2 and a half hours. My ryobi 18v 4amp lithium ion rechargeable batteries run full volume 4 to 6 hours and recharge in 1 hour. have been running my k_m_c 3 on the set up since september and have had nothing but powerful music listening sessions. the standard ryobi 18 volt lithium Iion batteries that come with the drill work okay but the only get maybe an hour to 2hrs of running time per charge. but there's no way to tell how charged the battery is. compared to the 4mp batteries which have a meter on the battery.
651899
Arrived promptly, popped in a Ryobi battery pack from another Ryobi tool and it worked as expected. Although it didn't come with a manual I had no problem downloading one online.  The only reason for the 4-star rating is that I cannot register the P209 Bare with Ryobi because it is sold by a 3rd party reseller and Ryobi will not recognize any repair warrantee. As a light user, this is not a problem for me other than being a bit disappointed but this might be a problem for another purchaser.
3455761
Fixed the issue where my phone was turning off randomly. I think my old battery had some bad cells.
137524
There was a problem and they fixed it right away at no charge to me! They will be my go-to battery store from now on.!!!
3982617
My Neato robots (xv11, 3 years old and xv21, one year old) were having difficulty getting back to their charging station.  Also, they were getting worn out trying to negotiate some obstacles like fringed rugs and stopping to demand a recharge.  I read that some of these effects were caused by weak batteries and that the newer models had less durable batteries.  I decided to replace the packs in both units.  I'm very happy with the batteries I purchased and the results.  All the problems disappeared.  the new batteries have been installed for a couple of months now.  Hopefully they will last longer that the pack in the xv21.  I run both units twice a week via the built in scheduler program, one upstairs on carpeted bedrooms and one downstairs on hardwood floors.  House is about 2600 sq ft.
1002822
As an Electrical Engineer I simply love the simplicity of this device. Older Battery isolation devices used charging potential to bias an opposed SCR bridge to charge the pair of batteries electrically isolated by the SCR's. The problem with this solution is 2 fold.

1. The voltage Drop across an SCR (PN junction)is about .8 volts. With nominal battery voltage of 12.3V and regulated alternators output usually 13.6V This .8 volt drop reduces the charging potential at the positive battery terminals to about 1/2 a volt. In the case of lead acid batteries....  .5 volts is not enough potential to force a charging current strong enough to de-sulfate the lead plates in the battery. The end result is much shorter battery life. All of we boaters who think our boats eat our batteries....this is usually the root cause.

2.  Where did the energy that should be charging our batteries properly go....why heat of course ....the SCR bridge is mounted to a heat sink to dissipate the heat (usually into our engine compartments)

This Blue Sea Device solves the problem of battery isolation...and also the issue of reduced battery charging potential...this unit, with other proper battery and electrical system maintenance, should stop our boats from eating our batteries.  My system and boat has never worked better. Thank you fellow engineers at Blue-Sea!!!
2188618
We love our Note 5 phones, but almost didn't buy them due to the lack of removable battery. I know all the Samsung lovers were disappointed with their decision to not have a removable battery. Cases like this do help solve the problem though.

I have always used external power banks as my emergency battery booster. This is a nice option. I love that I can put it on my phone and not turn it on until needed. It then charges my phone completely. I don't have to worry about bringing a power bank or cable with me. Nice!

I have two small issues with it. First, I can't access the pen. This isn't a huge deal, but I do use it pretty frequently and wish I could get to it. I knew this going into it so if this were my only issue I'd say it's 4.5 stars and round up. My other small issue is that it was very hard to get my phone to plug into it. My husband thought maybe I had bent something inside the port on my phone since it took way more force than what is should take to push my phone on it. Nope, my phone and the case both are fine and damage free.

Overall, this does solve a problem with the Note 5 and I'm glad to have it around. I was sent it to test and review. That has no bearing on the rating or review I am giving it. This is my honest opinion
246638
The power cover I received was able to prolong my old Surface Pro's life for a bit longer.

After reading most of the 1-2 star reviews here are some solutions to try due to the age of the battery.

* First make sure to remove the little tag warning you from plugging the power cover directly into the charger. That will cause it to not be recognized.
* If you are getting 0% to 100% instantly cycle the battery a few times by leaving it attached for 5 minutes and removing it for 5 minutes until it starts to charge. Reason for this is these covers have sat in storage for a few years and need to be refreshed to operate normally. This is a flaw with most rechargeable batteries.

The warranty being claimed already is more than likely the warranty starting on the day of purchase prior to amazon. This doesn't mean it is used just that the product came off of a shelf prior to being sold on amazon. This is the only reason for the 4 star and not a 5 star.
3122099
I like it and it made a nice change from ripping my arm out of its socket trying to start a gas powered Ryobi model. Simply put, plug in and go.

One little niggle, the electric hook up is just about 1 foot down the cable from the blower and as you walk around with it, the electric lead that plugs into it, gets pulled out very, very, easily. I started using it by holding the lead as I walk around, but I shouldn't have to. Toro might want to consider fitting a small clip to keep the electric lead firmly in place. Nothing dangerous, just a little niggle.
912807
Surprising power for 20v. I wish it was easier to flip the head over and edge - the process to do that is a little awkward compared to my battery powered Craftsman. Still, this has much more power and not worth subtracting a star for that. Replacing line is super easy if you use their pre-wound spools. If you're a cheapskate like me, well, it's not as easy, but not bad.  I do wish Lithium batteries had a "warning" before they stop. Because when the battery dies - the unit just switches off and you are finished. (Just buy an aftermarket battery!)
4801868
I had 18v regular battery.  I now have 20v lithium.  Both were and are pretty good in their class.  Both in the heavy weight, and this 16v is perfect for my mom.  Putting my hand on the nozzle to feel the suction, I was surprised it felt the same as my 20v.  The nozzle is also a lot longer than the 20v.  I think B&D should put 20v battery and bigger fan or motor into this design.  The way this sits on the charge base may be a bit insecure.  I would have liked rounder base and less teeter-tottering.  The plug should be GFCI for better protection.
This is akin to apple's ipod and congrats to the design team.  People pay a lot for ipod functionality and form.  I think B&D should take this into the upper step.
1573676
The 18v Battery seems to be just fine, though it's a little early to give a product review as I have not used it yet other than just trial.
3321582
I purchased this battery along with the Watchdog BWE backup sump pump back in June of 2008.  At the time I forked out close to 150 dollars for the battery plus acid thinking the extra money spent would equal extra peace of mind.  Well, it's March 2011 and I now have to replace the battery.  We haven't been getting alot of rain and after a dry fall and winter, so my sump pumps (I have two pumps in the same hole, one the Watchdog the other my primary pump) haven't gotten alot of exercise lately.  I try to check out the operational status of my Watchdog at least every six months to make sure all is well.  For the last few days we have been getting alot of rain so the sump pump has been quite active.  I decided that it was a good opportunity to check everything again.  My test was simple, simulate a power outage by unplugging my primary pump and the trickle charger on the Watchdog so that it would run on the battery only.  My first problem, which really has nothing to do with this review but surprised me nonetheless, was the first time the Watchdog pump activated, nothing happened.  When I say, "nothing happened" I mean the pump activated, but did not pump any water.  Upon further investigation, it seemed the pump had lost its prime.  I actually had to re-prime the pump to get things flowing again.  I was alarmed, because if this had been a real power outage and I had not been home, I may very well have returned to a flooded basement.  This is a new development that has never happened before, so I'm not sure what the problem is and will investigate further, but I figured it was worth mentioning here.
  Now the battery problem.  After I got the pump pumping again all seemed well.  That is, until the fourth cycle of the pump, the "defective/bad battery" light illuminated and sounded an alarm indicating something was wrong with the battery.  Now, I was really worried.  First the pump didn't want to pump on its first (and most crucial) pumping.  Now the battery was having issues, so out came the multi-tester.  To my dismay, the unloaded DC voltage on the battery read 11.9 volts and the loaded voltage read 11.5/11.6 volts.  I tested the charger just to make sure there wasn't a problem there, but the voltage read 13.9 volts in two second bursts (two seconds on, two seconds off) which is typical of a trickle charger.  Next, I popped off the covers to check the acid levels, and all was well there too.  At this point, I was hoping that maybe my tester and the control unit were somehow both wrong.  Not likely.  As I was performing my tests, the pump kept on pumping, that is until about the 10th or 11th cycle when everything came to a screeching halt, when the battery finally gave up and the pump began clicking, unable to draw enough power to pump.  At this point just to exhaust all of my options, I pulled the battery and put it on a Snap-On commercial grade battery charger that I own, that also has a built in tester to check and see if the battery is any good or not.  Not to my surprise, the battery was bad, and even though it would hold a charge, it didn't hold it for long.  So much for 7.5 hours of continuous run time.  All of this is not uncommon however.  Batteries DO go bad, even relatively new ones.  What irritated me however, was upon further investigation of the literature that accompanied the battery, I discovered the warranty was only a year!  I can get a Duralast (just a DieHard battery thats been rebadged) deep cycle battery from Autozone with a 3 year warranty for 90 dollars, and I know they are good batteries.  I've been using them in all of my vehicles for many years.  So take this review how you will, but I know how I will be spending my hard earned money on the next battery I purchase.
2720529
My Note 4 was draining the battery very fast.  In two hours my battery would be 60%.  While this item was being shipped I stopped by Samsung repair and they replaced my battery for free and told me to not use power banks because that's probably what ruined the original battery.  That's fine because now I have a spare that is always at 100%! My battery lasts so long now that I normally don't need it but it's nice to have knowing that  a power ban could ruin my battery.  Now I wish that I hadn't purchased the power bank though.  Even now my phone is at 25% and it's 12am.  I have not charged it since 8 am.  I could swap the battery now and use my phone until I fall asleep.  It will last through tomorrow night without charging.  Then I'll swap again before bed.  That's a really nice option imao.
3664146
I have been using this charger for over 5 years.  I received it as part of a Ryobi battery operated drill set.
I have never had any problems whatsoever with any of the battery powered items contained in the suitcase style Kit, other than one of the 18 volt batteries got extremely weak. A replacement was simple to find.  I recommend the Ryobi brand.
Larry
495187
This product worked damn good after I fixed a minor design flaw. The battery is NOT secure in the cavity. I kept getting drop outs that were REALLY pissing me off. But I added some velcro into the cavity and use a tiny strip on the battery and that solved the problem. No noticeable signal loss with a regular guitar. I'll update the review after some serious use, but so far, so good!
820230
I originally gave this a 3 Star. However, after watching another review, the review described an issue I will repost here. The rechargeable batteries (2A style) need to be same voltage and helps to be same maker. By voltage you can see on the side of the battery what the voltage is 1.2v, 1.3v, 1.5v etc. Other wise this grip is entirely fantastic.

Another bonus is the second battery insert holds the square styled battery that comes with the camera. I tested and it will work with a single battery even though it can hold two batteries. This is a great product.