diff --git a/README.md b/README.md
index 3f6408d..3c3f507 100644
--- a/README.md
+++ b/README.md
@@ -91,8 +91,16 @@ after 0.1 ms (as set in OC_TIMER, in Configuration Data Byte 2, in EEPROM) the h
 this also clears the over-current state.
 after 100 ms the HUB will re-enable power.
 this loop will repeat indefinitely.
-no over-current is reported to the host in this case.
-it is only reported when the OCS is asserted for longer (unknown time).
+no over-current is reported to the host in this case (when the over-current is cleared while power is off).
+it is only reported when the OCS is asserted for longer (unknown time, with OCS kept low also when powered off).
+
+following current limiters have been tested:
+
+- 0.5A PPTC fuse: it takes too long to trigger (> 1s), and switch off is not reliably detected
+- MT9700: it has no over-current signal
+- SY6288AAAC: the (fixed) current limit is not 0.6A, but around 1.5A
+- TJ2242GSF6: over-current is only detected after 3s (instead of specified 100us, probably caused by thermal shutdown), and it is not signaled
+- DIO7553ST6: works as expected and wished
 
 LED color
 ---------