Heatsinks are a kind of portal mod.

Heatsinks make portals “cool down” faster, so you don’t have to wait as long between hacks.

• No heatsink: portal cool-down takes five minutes. 5:00 between hacks.
• Common heatsink (CHS): cool-down is 20% faster. 4:00 between hacks.
• Rare heatsink (RHS): cool-down is 50% faster. 2:30 between hacks.
• Very Rare heatsink (VRHS): cool-down is 70% faster. 1:30 between hacks.

All players benefit from the shorter cool-down time - you, your team, and the enemy team.

Deploying a heatsink also gives you, and only you, the following bonuses:

• Resets the portal cool-down timer - so you can hack again immediately.
• Resets the portal burn-out timer - so you can keep hacking a portal after you burn it out. (See also: the Multi-hack mod.)

Multiple heat-sinks: The best heat-sink gives its full bonus. The second, third, and fourth heat-sink(s) only give 1/5th bonus.

Durability: Heat-sinks are fragile. They are easily destroyed by enemy weapons fire.

Up to Portal Mods.