The following lithium-ion batteries have been tested with the Syntiant TinyML development board:
1832-1053-ND 3.7V rechargeable 1Ah
1832-1045-ND 3.7V rechargeable 70mAh
The connector on the TinyML is similar to JST SM02B-SRSS-TB(LF)(SN) which mates with JST SH series connector like the SHR-02V-S-B.