Tungsten weighs 1.7 times more than lead! Only gold, platinum, and a few other precious metals have a similar density. Tungsten is also completely non-toxic and environmentally friendly. It's a really hard metal, and will last for years. It's a nice one time investment.

These plates are 99.97% pure tungsten! This plate is 1/16" x 0.52" x 2.36". They weigh 0.81 oz each. It will fit under your LiPo battery.

These are sold individually.