Good morning,

I use a a Li-ion Polymer Battery with model "HPL402323-2C-190mAh" (Vnominal = 3.7 V and C = 190 mA/h) for my system. i put my load in each output to simulate my system also i set the battery SOC (0%) with battery voltage 2.9 V and battery SOC (100%) with battery voltage Vterminal = 4.2 V. 

When the discharge begin it looks normal but when the battery voltage reaches 2.9 V, this latter dropout instantly to 0 V and when i put back the USB charger and begin to charge with nearly its nominal battery voltage.

My question is why and what should i do to fix this problem??

Thanks and best regards,