A late penalty from Johnnie Jackson preserved Charlton's unbeaten start to the season against Tranmere.
Having made a bright opening the visitors went ahead when Adam McGurk's strike took a deflection off Chris Solly and flew into the top corner.
The Addicks improved after the break and Dale Stephens and Danny Hollands both went close.
Yann Kermorgant was fouled in the area by Ian Goodison and Jackson consummately levelled from the spot.
Charlton, who have now gone 12 games unbeaten at the start of the season - their best start to a campaign since 1927 - still top League One but now sit just three points above Sheffield Wednesday.
Tranmere, who paid the price for failing to make the most of their excellent first-half showing, remain in 12th.
The result means Rovers are still searching for their first victory at the Valley since 1995.
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Charlton boss Chris Powell told BBC London 94.9:
"We had a lot of time wasting and spoiling but we have to expect that from teams who come here.
"To get a point at the leaders is always a fantastic point for any team.
"We could have nicked it in the end but it wasn't mean to be.
"Our run remains unbeaten and we're still top, exactly where we want to be."
Tranmere manager Les Parry told BBC Radio Merseyside:
"I thought it was a magnificent performance from all the lads.
"I said to them in the dressing room, 'you're disappointed only getting one point from Charlton and that tells you how far you've come'.
"We're a little bit unfortunate in our league position and I think if we were two or three places higher up, it wouldn't be unfair."