Mali → Equatorial Guinea
Mali plugs
Equatorial Guinea plugs
Shared plug types: C, E
Compatibility: Compatible
Voltage — Mali 230V — Equatorial Guinea 230V
Voltage is the same. Your devices should work normally.
Device compatibility (phones)
Phones almost always support 100–240V, so yours should work safely. Check your charger label to confirm.
You likely only need a plug adapter (if socket shapes differ). Voltage is close between these countries.