It's about 20,000 times as heavy as a Battery (D).
In other words, 2.80 tons is 18,800 times the weight of a Battery (D), and the weight of a Battery (D) is 0.00005320 times that amount.(Alkaline)
A "D" size battery weighs 0.000149 tons. The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about 25,000 times as heavy as a Deck of Cards.
In other words, the weight of a Deck of Cards is 0.0000370 times 2.80 tons.(ISO 216 B8 size, a.k.a. "poker size" 63 x 88 mm, 52-card deck)
A deck of 52 ISO 216 B8-size playing cards weighs 0.0001 tons. Utilizing nearly 3,700 decks, the record-holding largest card tower was built in early 2010, stood over 3.5 m (11 ft), and weighed over 0.250 tons.
It's about 40,000 times as heavy as a Battery (C).
In other words, 2.80 tons is 39,000 times the weight of a Battery (C), and the weight of a Battery (C) is 0.0000260 times that amount.(Alkaline)
A "C" size battery weighs 0.0000720 tons. C batteries are typically used in medium-drain devices such as musical instruments.
It's about 45,000 times as heavy as a Tennis Ball.
In other words, the weight of a Tennis Ball is 0.00002270 times 2.80 tons.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 0.00006360 tons. Competition balls are also tested for bounce height, with the standards requiring that a ball dropped from 254 cm must bounce back to a height of 135 cm to 147 cm.
It's about one-forty-five-thousandth as heavy as The CN Tower.
In other words, 2.80 tons is 0.0000215430 times the weight of The CN Tower, and the weight of The CN Tower is 46,419 times that amount.(a.k.a. La Tour CN, a.k.a. Canadian National Tower, a.k.a. Canada's National Tower) (Toronto, Canada)
The CN Tower weighs approximately 129,970 tons. The Tower is home to the world's highest glass floor — a viewing area that allows visitors to look straight down 342 m (1,120 ft) to the ground below.
It's about 55,000 times as heavy as a Golf Ball.
In other words, 2.80 tons is 55,300 times the weight of a Golf Ball, and the weight of a Golf Ball is 0.000018080 times that amount.(per R&A USGA Rules of Golf; maximum rule weight)
According to the Rules of Golf (as approved by the United States Golf Association and the Rules Committee of the Royal and Ancient Golf Club of Saint Andrews), golf balls must weigh no more than 0.000050630 tons. Golf balls are not required to have the familiar dimpled pattern, but the design has been popular since its invention in 1905 because it reduces drag while increasing lift.
It's about 75,000 times as heavy as a Light Bulb.
In other words, the weight of a Light Bulb is 0.0000130 times 2.80 tons.(a.k.a. lamp) (for A19-size, 60w, incandescent bulb by Bulbrite; package weight)
A standard, sixty-watt light bulb weighs about 0.0000380 tons. The tightly-coiled filament inside a bulb of this size would measure about 579mm if uncoiled and stretched out.