# Feb 2020 18650 Recommendations **URL:** https://foil.zone/t/feb-2020-18650-recommendations/6956 **Category:** Electronics (ESC, remote, batteries) **Created:** [February 24, 2020, 4:49pm UTC](https://foil.zone/t/feb-2020-18650-recommendations/6956 "2020-02-24T16:49:15Z") **Posts on this page:** 1 **Showing post:** 7
### Author: ![Flightjunkie](https://foil.zone/user_avatar/foil.zone/flightjunkie/32/8316_2.png) [@Flightjunkie](https://foil.zone/u/Flightjunkie) #### Post date: [February 25, 2020, 5:58pm UTC](https://foil.zone/t/feb-2020-18650-recommendations/6956/7 "2020-02-25T17:58:13Z")
The 250 cycle rating is if you draw 15amps continuous from 4.2v down to 2.5v. Doing this causes the cell to get really hot. This is why the life is short. My pack is 14s14p and I foil at an average amp draw of 30a. So, 30 ÷ 14 = 2.14amps per cell. My pack barely even gets warm. If you keep the load per cell low these cells will last 1000s of cycles with minimal reduction in capacity. It’s amazing this cell can handle 250 cycles at a 15a continuous draw considering the cell gets up to it’s 250 cycle rated temp of 140°F (60°F). I tested the cells at 10a continuous discharge and they got too hot to touch, but well within the manufacturer specifications. It is this heat that limits cycle life. Run your cells where they stay cool and they will last forever (1000s of cycles). 🤙 [![](https://img.youtube.com/vi/EEPSu-bQs5U/maxresdefault.jpg "Testing samsung 30Q cells from IMR") ](https://www.youtube.com/watch?v=EEPSu-bQs5U) ![20200224_172929](https://foil.zone/uploads/default/original/2X/d/d7f646c18a92faf6a9675ad9f15b6855583b5948.jpeg) My battery build: > **[Building an 18650 battery with individual cell fuse wires](https://foil.zone/t/building-an-18650-battery-with-individual-cell-fuse-wires/5611)** > > Hi guys. Do you guys keep you batteries in a fireproof box when left unattended? 18650 cells are safer then Lipos but the size of the batteries we build for these e-foil board have enough power to burn several houses down! I see the most common... --- _[View the full topic](https://foil.zone/t/feb-2020-18650-recommendations/6956)._