NinjaBatt Battery Replacement for Lenovo L12L4A02 G50 G50-45 L12S4A02 L12M4A02 L12M4E01 Z50 L12L4E01 Z70 L12S4E01 Z50-70 Z70-80 G50-70 G505S G500S Z50-75 G400S High Performance [4 Cells/2200mAh/33Wh]

Fits perfectly and holds its charge perfectly after a month+ of use.

Best battery on the aftermarket scene. Looks as good as a OME battery but at a better price! Bought for my Lenovo G505S, only con is it’s about 1.5- 2 hr battery life on Mid settings, not that big of a deal for myself but still want an honest review.In the end NinjaBatt should be the only place for your laptop needs before you shop anywhere else, best quality period.

it took seconds to replace the old battery. The life of the battery in the short term is adequate. It never lasts as long as I would like but it gets the job done. As far as long term battery life goes, time will tell. The battery was priced competitively. Great Value!

Do not waste your money.Purchased this battery for Lenovo laptop on November 29, 2024. Once received, followed instructions on charging/discharging battery before usage. Battery performed descent, holding charge for approx 1.5-2hrs before needing to recharge.Now, February 28, 2025, 3months later, the battery will only charge for approx 1min then stops charging.

Purchased for a Lenovo Z710. At the first boot-up, got a warning message that it's an "unauthorized battery". Note that I have not gotten that message before with two other brands of non-OEM batteries with this laptop. The battery was only indicating 1% charge and that would not increase. Same result after a reboot. Then did a reboot where you hold down the power button for +15 seconds and release. The message did not show again, and the battery showed 80% power and charged up to 96%. Shut down for the evening and rebooted the next day. Now a message pops up saying "The battery is weak..." and it indicates 60%, and if I unplug, it lasts about 30 minutes. I've requested a replacement. We'll see if I get different results.P.S. Received the new battery, and from all indications it is working fine and giving consistent results. It properly charges and has acceptable life when unplugged. Still get the messages that it's a weak battery or a damaged battery (if charged to greater than 90%). Those messages are a Lenovo generated issue.Changed rating from 2 stars to 4 stars.

I was very impressed with the short time it took from ordering to delivery. I like how it was packaged and it was very easy to install. I was concerned about the fit, but it was very easy to install in my Lenovo laptop. My original battery would only charge to 60%. This battery charged to 100% in a very short period of time. I have not run the laptop on the battery yet, but I suspect it will be fine.

Brought my 10 year old laptop back to life! Getting more than 4 hours now and without use over 5. Battery stays charged when laptop is shut down. Might sound obvious but was never able to take the laptop anywhere without the plug. Good product!

Needed a battery replacement and this is the one turned too. It is working great and not any issues. I’m very satisfied