what does built-in LiPo discharge protection look like?

I bought a 100 mAh LiPo from the b&H website because it specifically said that it had overdischarge protection. I really need a reasonable lifetime for this battery so I hooked up the battery to a 15 kOhm resistor overnight to see what voltage it would be in the morning.

to my surprise, the voltage read 0.17V! Is that correct?

but when I Plug in the charger it rises to 3.0 V super fast almost as if t were there the whole time.

Does this make sense for a circuit with discharge protection? How can I be certain that this is true discharge protection?

• "How can I be certain" - buy from a reputable source and make sure that you read the fine print. – Andy aka Feb 14 '18 at 14:15
• A simple google finds, "The voltage of a discharged LiPo cell is 3.00V, and discharging below this will definitely damage the cell." So that's a worry. Also, $\frac{3.7\:\text{V}}{15\:\text{k}\Omega}\approx 250\:\mu\text{A}$. You should get several hundred hours from that battery, or more, at that low draw rate. Assuming it was fully charged to begin with. Had you charged it? – jonk Feb 14 '18 at 14:17