Battery not compatible with lenovo R61
341945
I was disappointed with this purchase as the battery sent to me was not compatible with my laptop lenovo R61. I simply wasted my time and shipping money on this purchase. I am now sceptical of buying any cheap battery from a third party because of the compatibility issues though I know that does not help me. I am now working without the battery on my laptop for few months and will eventually have to go for a pricier battery unless I can find a reliable seller that sells cheap R61 battery which is truly compatible.
2665333
When I first plugged in my Vostro 1500 after installing this battery, I noticed the battery light on the right side of the computer was flashing alternatively red and green.  When I pushed the power button to start the computer, the BIOS flashed a message that the battery could not be identified and would not be charged in the system.  I pressed F1 to continue and the computer booted up in Windows XP.  I checked the Power Options in the Control Panel and noted the battery power indicated 52%.  I turned OFF the computer and let it charge for three hours.  After re-starting, I received the same message about the battery not being identified.  I pressed F1 to continue and proceeded to the Power Option to read the battery power; it was still at 52%.  This battery is not compatible with the Dell Vostro 1500.
2012130
I purchased this battery because my original battery was starting to last less and less. This one really caught my attention because of how much cheaper it is than an original HP battery. It was also one of the batteries with the best reviews.

It lasts so much longer than my original. I've used it for almost 4 hours straight, and I'm not even at 50% yet.

However, there is a problem: the battery does not lock into my Pavilion dv6tqe properly.

I've had this battery for three days, and so far, every day that I've picked the laptop off the table, the battery has been left there, and I'm left holding a lifeless laptop. Maybe I just got a defective battery, but this one does not lock into the laptop fully, while the original battery fit perfectly and locked in great.

This issue is infinitely more frustrating than a short battery life.

Otherwise, great product!

UPDATE: Anker contacted me multiple times about the "defective" battery, and was very eager to send a replacement. Very good customer service! The replacement battery is much better than the first.
4858675
I received both Lenmar DLP006 Batteries for use with my Panasonic DMC-FZ8 Camera and neither would charge with my camera's charger..beware
2810043
Battery has no charging capacity anymore. I have to leave my laptop on the charger to use it now
2256178
I have an R717 camera.  I bought the dock too.  Each one comes with a battery and the batteries look identical.  HP labels both as an R07 battery but the L1812A has squared edges running logitudinally and this feature makes it very difficult to remove from the camera.  The other battery is the L1812B and is identical in every way except its edges are rounded and that makes enough difference to allow it to easily slide out of the camera. I bought a "clone" battery (not HP) and its edges are rounded too.  Maybe HP could explain the difference.  Just thought you would like to know.
2264712
Battery looks identical to OEM unit, but apparently there is a slight internal difference. The laptop would not charge this battery or recognize is as being connected. My original AC adapter and battery still function normally, indicating that this replacement unit is not compatible as advertised. The vendor was very helpful and shipped a second battery when the first one proved faulty, but results were the same with both units.
4420225
The battery arrived on time and worked fine.  My issue is that the average person with no electronic background can not replace the battery.  I had to call my computer go too guy to install it at the tune of $90.00.  Samsung laptops are not user friendly where batteries are concerned.
37074
Battery does not work at all, I need a replacement
136864
Battery was DOA, "dead on Arrival".  It arrived in a sealed Lenovo package, was defective.  Not the fault of the shipper, they couldn't have known it was no good, unless they had opened the package and tested it.  Attempted to charge it for several hours, and it was still dead... so returned for a refund.
1554799
Bough this replacement for a laptop located outside US. At installation had 70%, but once the battery drained that 70% it wouldnt recharge; and impossible to return due to distance/time constraints
4586836
My battery was made by AGPTEK, might be a great replacement battery, but not as advertised. As quoted from technical details
-GENUINE LENOVO RETAIL PACKAGED AND FACTORY SEALED BY LENOVO
-51j0499 genuine lenovo retail product
Beware when ordering this is NOt a genuine Lenovo battery.
3137133
If you buy this battery make sure that you check the contacts in the battery. On the battery I received, the contacts were
barely visable. They did not make contact with the receptacle contacts  in my laptop. The battery would not charge. I would hope the manufacturer inspects this problem before shipping.
205977
The battery was the correct battery for the Lenovo Laptop however it was the wrong mAh, the original Lenovo Battery called for 2800 mAh this battery was 2200 mAh, would ne recharge.
1741784
Works great. I highly recommend replacing a laptop battery with the manufacturer's battery. I purchased a Rayovac replacement battery for my Lenovo and it was an unsatisfactory replacement. Wish I had purchased this one last time!
1797600
The battery is old.  It will hold a charge for a couple of days but if the laptop isn't used, it loses its charge and I have to go through the BIOS Setup all over again.  Would not recommend this product from this vendor.
2059335
This battery did not work. Price was good but it almost caused me to replace my laptop which would have wasted hundreds of dollars. Instead I went to batteries plus and paid much more for a battery but my laptop is now like new with the batteries plus battery.