Cape Verde → Mauritania
Cape Verde plugs
Type C
Type FMauritania plugs
Type C
Type EShared plug type: C
Compatibility: Compatible
Voltage — Cape Verde 230V — Mauritania 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.