Just the charging of a Li-ion type battery can't be 95% efficient. The typical charging efficiency of Li-ion batteries is about 90% on average (for good batteries in decent shape, that is, and can be as low as 80%) and if you add the charger's efficiency itself, which will probably be in the order of 90% at best, you're already down to 81%. Those figures sound like reasonable estimates.
As for discharge, I'm sure it depends a lot on the battery itself and use conditions, but an average of 90% looks like a reasonsable (if even optimistic) estimate.
All combined, you're already down to 73%.
Then you will have losses in the power electronics circuitry and electric motor(s).
It wouldn't seem like an unreasonable estimate to end up at 50% to 60%, at the very best, of overall efficiency for an electric car, taken from charging power to the power delivered at the wheels.