Timex Ironman Triathlon Battery Replacement Shock T5K196 and others
Changing the watch battery of a Timex Ironman Triathlon watch is easy. In this video I use model T5K196, which uses battery CR2016, , but these instructions work with most Timex Ironman models. Please check the back of your watch for the correct battery type. When you want to replace the battery, the trickiest part is unlatching the battery at 2:01

If you'd like to know how to set the watch after changing the battery, watch: How to Set A Timex Ironman Triathlon Shock and Use Chrono, Timer, and Alarm:    • How to Set Timex Ironman Triathlon  ...  

To Reset the watch after changing the battery or if watch malfunctions:    • How to Short Pads To Reset Timex Iron...  

Timex Ironman models this should work for (if it doesn't, please let me know in the comments):
Timex Ironman Shock T5k195, T5k196, 5K1959J, TW5M13800JT
Timex Ironman Classic and Traditional 30 lap, 50 lap, 100 lap T5K4949J, T5E901JT, T5K412JT, T5K821JT, T5K692JT, T5K822JT, TW5M077009J, TW5M14100JT, TW5M14000JT, TW5M075009J, TW5M074009J, TW5M076009J, TW5M077009J, T5E2319J
Timex Ironman Essential 10 Lap T5K608JT, TW5M102009J, TW5M101009J, TW5K940009J, TW5K937009J, T5K6089J, T5K6079J, TW5M114009J
Timex Ironman Rugged 30 Lap T5K793JT
Timex Ironman Sleek 50 T5K4519J, T5E5119J, T5K7019J,
Older models: T5K196, T5E901, T5K793, T5E231, T5K195, T5K413, T54281, T5K451, T5K529, T5K4949J, T5K523, T5H591, T5K784, TW4M07200, T5K608, T5K739, TW5M14500, T5K809, T5K606, T5K8269J, T5K656, T5K187, TW5K908009J, TWM10900, T5K783, TW5M10200, T5K584, T5K522, TW5M10300, T5K791, TW510400, T5K70609J, T5K7579J, t5j6419j