Quick tech specs
  • Notebook battery
  • 6-cell
  • FRU
  • for ThinkPad P50 20EN
  • 20HJ
  • lithium ion
  • 90 Wh
  • CRU
  • 20EQ; P51 20HH
  • 20MM
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The 6-cell ThinkPad battery 77+ is a replacement/spare battery for P50 system. The battery is rechargeable and can be used as replacement or as a convenient spare for mobile workstation ThinkPad P50 system. This battery is powered by Lithium-Ion technology and has a safeguard chip which authenticates with Lenovo systems. The battery lasts on average 90 watt hours and utilises over-discharge protection to ensure a secure flow of power.

*Many factors affect battery life. These include: screen brightness, battery conditioning, features, applications, power management and other customer preferences.
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Lenovo ThinkPad Battery 77+ - notebook battery - Li-Ion - 90 Wh

This Item: Lenovo ThinkPad Battery 77+ - notebook battery - Li-Ion - 90 Wh


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Lenovo ThinkPad Battery 77+ - notebook battery - Li-Ion - 90 Wh is rated 4.11 out of 5 by 9.
Rated 5 out of 5 by from A necessary buy for a P51 The P51 (especially with 4K screen) is very power hungry. For airline travel, you'll definitely need this battery. Here's why: The P51 power brick is giant. At about 1.5 pounds, it's luggable. The overall power picture, though, is the machine's weakness. For air travel, I bought this extra battery immediately. When I plug into an AA power port, the machine warns that it's on airline power, which isn't enough to drive the machine. Instead, it draws power from both the power port *and* the battery, so the battery drains during flight. You will not land with a full battery ... beware. I have tried running only with battery stretch mode: the machine is very sluggish and the screen is dim. I haven't needed to push the machine to max performance yet ... but I expect only a few hours per battery in this mode. Considering this, I now have a 90W power supply (LVSUN LS-PAB90S-2U) that I'll be trying on my next trip. It's much smaller/lighter than the 170W brick and may do just as well. Though I'll probably find myself wishing for the brick once I get to my destination. The jury is definitely out on this. FWIW, the machine *will not* run just on seat power ... it really needs to draw on the battery, too.
Date published: 2017-08-20T00:00:00-04:00
Rated 5 out of 5 by from Fair life The battery life for the replacement is not nearly as good as the original was. I could easily get 5 or 6 hours of use on the battery when I purchased and with the replacement 2 hours is the maximum.
Date published: 2018-03-16T00:00:00-04:00
Rated 5 out of 5 by from Love the removable battery on Lenovo computers! I love that Lenovo computers have a removable battery -- my computer is about 5 years old... still works great, but the battery would no longer charge. Went online, purchased a new one, and about a week later I feel like my computer is brand new again (well... lightly used). Thank you Lenovo!
Date published: 2020-07-21T00:00:00-04:00
Rated 5 out of 5 by from Works on my P50 Arrived on time. Battery works on my P50 without any issues.
Date published: 2020-05-31T00:00:00-04:00
Rated 5 out of 5 by from Pretty Good My previous battery had started out lasting 8 hours, but decayed to only 1.5 after a while. I got this one as a replacement and it lasts more in the 6 hour range with the screen brightness at max level and active usage. It works pretty well.
Date published: 2018-10-08T00:00:00-04:00
Rated 5 out of 5 by from New battery couldn’t be easier! Right purchase. Slipped into its place on the back of my Lenovo P 53 like a glove. Came 50% charged, and began charging right away. Absolutely no hassle of any kind whether it’s finding, purchase or delivery!
Date published: 2021-04-23T00:00:00-04:00
Rated 5 out of 5 by from Battery Fit into laptop, the battery works wonderfully. Thanks.
Date published: 2021-04-04T00:00:00-04:00
Rated 5 out of 5 by from Lenovo Sucks Never received my battery. Can’t get them answer me on where it is. Will never buy any of their products again.
Date published: 2021-05-30T00:00:00-04:00
Rated 5 out of 5 by from P50 Replacement Battery 90Wh Exact replacement for a P50 90Wh battery. Works as expected. No issues.
Date published: 2021-08-03T00:00:00-04:00