According to this massive review...
https://budgetlightforum.com/t/-/5882
...the Tank007 E09 has a 16 or 18 hour runtime on low with an 800mAh AAA Eneloop.
EDIT: This review...
https://budgetlightforum.com/t/-/8032
...says the Tank007 E09 has a 3 lumens low with a Nimh AAA battery.