It seems that all the tractor needs is a new battery.    From LearnThat.org. 

Took a battery of achievement tests.    From Wordnet, Princeton University. 

Power for charging the battery is another problem.    From Wordnik.com.  [Smart Mobs » Blog Archive » African users’ innovative use of mobile phones] Reference

Even when the battery is at 100% - it still says “charging”.    From Wordnik.com.  [Computer Geek Question] Reference

Therefore, the battery is the only component on your system that has a special one year warranty.    From Wordnik.com.  [Dear Mr. Dell « BuzzMachine] Reference

That battery is flat out dead and so is the brand.    From Wordnik.com.  [5 lessons from GOP's Southern gathering] Reference

"And what is inside this thing you call a battery?".    From Wordnik.com.  [A Corridor in the Asylum] Reference

Alas, Samsung's battery is at least two years away.    From Wordnik.com.  [Ahead from Samsung: Laptop battery that runs for weeks] Reference

Which I need to make sure the battery is charged for.    From Wordnik.com.  [once more, with feeling] Reference

"You gotta speed up lady, my battery is running low.".    From Wordnik.com.  [The Latest Gimmick: Last Call, an Interactive Horror Movie, Will Phone You During the Film | /Film] Reference

Race to build electric cars could drain battery supply.    From Wordnik.com.  [Coffee Break: Oct. 31] Reference

Ask retailers to label battery eggs as "eggs from caged hens.".    From Wordnik.com.  [WN.com - Articles related to Congress begins investigating salmonella outbreak, egg recalls] Reference

The battery is now free and you can remove it from the laptop.    From Wordnik.com.  [2009 March « oneduasan] Reference

The battery is great, which is essential in any portable device.    From Wordnik.com.  [The Lessons From the Kindle’s Success - Bits Blog - NYTimes.com] Reference

Re: "State senator arrested in battery, theft," Page 1, July 28.    From Wordnik.com.  [Your Right Hand Thief] Reference

She then told me to fetch the durex battery from the sideboard!!!.    From Wordnik.com.  [The Durex Bunny & Mrs S] Reference

In Indiana, battery is “a rude, insolent, or angry touching.”.    From Wordnik.com.  [The Volokh Conspiracy » Indiana Appellate Case on the Right to Resist a Police Officer’s Unlawful Entry] Reference

And the battery is so low that it won't let the computer start up.    From Wordnik.com.  [Discourse.net: 2010 - the Year of the Beeps - Part One] Reference

I have a circa 2006 MacBook Pro and the battery is pretty much shot.    From Wordnik.com.  [Personal Tech Live with Rob Pegoraro] Reference

Some systems have a second battery for use if the main battery fails.    From Wordnik.com.  [No getting around it: Going from wallpaper to paint on drywall is a chore] Reference

All of a sudden my battery is discharging at the rate of 1% every 2 minutes.    From Wordnik.com.  [Archive 2008-08-01] Reference

I have a 15″ Powerbook G4 laptop but my battery is not part of the recall.    From Wordnik.com.  [No new laptop battery for me — Meandering Passage] Reference

Consider that the operable range of charge in the battery is 65%, or 10.4 kWh.    From Wordnik.com.  [Chevrolet Volt: A Win for the Home Team] Reference

Why do you press harder on a remote control when you know the battery is dead?.    From Wordnik.com.  [Pondering Questions…] Reference

• Coined the word battery and first used "+" and "-" signs regarding electricity.    From Wordnik.com.  [StarTribune.com rss feed] Reference

If you have an iPod, you need to go buy a new one just because the battery is dead.    From Wordnik.com.  [Cult of Apple - Part 2] Reference

I tried it on my Eee with Ubuntu and didn't notice and improvement in battery life.    From Wordnik.com.  [Granola Scales Your CPU For Energy Savings | Lifehacker Australia] Reference

A big boost came from Berkshire's investment in Chinese battery and car maker BYD Co.    From Wordnik.com.  [Berkshire Trumpets Its Rebound, With Caveats] Reference

Incoming SMS messages and alerts about that the battery is low interupts Skype calls.    From Wordnik.com.  [4 Ways to Make Skype on the iPhone Even Better] Reference

A generator would be able to provide extra power when the house battery is off or dead.    From Wordnik.com.  [Generation Manual | SciFi, Fantasy & Horror Collectibles] Reference

Donald Sadoway (also of MIT) says that a big step forward in battery tech is achieveable.    From Wordnik.com.  [Hydrogen Cars, Arnold Kling | EconLog | Library of Economics and Liberty] Reference

Is it any wonder that the modifier most frequently used with the word battery is 'damned?'.    From Wordnik.com.  [SeekingAlpha.com: Home Page] Reference

Is it any wonder that the modifier most frequently used with with the word battery is 'damned?'.    From Wordnik.com.  [Alternative Energy Stocks] Reference

Chirp counts visitors, giving feedback to the owner and it also signals when the battery is low.    From Wordnik.com.  [Garmin Chirp - A new twist in geocaching] Reference

It looks like a normal book, except perhaps there is a thin battery and USB port in the binding.    From Wordnik.com.  [Buckypaper and the End of Print Literature] Reference

But without any major advances in battery technology, the new race is all about power efficiency.    From Wordnik.com.  [Intel’s CULV: New Name for Old Chips] Reference

And there's the question of what to do with the spent lithium once the battery is no longer usable?.    From Wordnik.com.  [What Will Fuel The Future?] Reference