With all of these features, though, the 5300ce was quite ahead of other laptop models at the time. Multiple problems with reliability, stability and safety (by some, the model was referred as the "HindenBook" because the lithium ion batteries used actually burst into flame in Apple tests, necessitating a recall and downgrade to nickel metal hydride batteries) were present in the early 5300s. After Apple offered an Extended Repair Program, the series turned into a remarkably attractive machine, but never lost its bad reputation. The bad publicity of 5300 series added to the woes of "beleaguered Apple" during the mid-1990s. Apple recovered from the 5300 debacle in 1996 and 1997 by introducing three new PowerBooks: the PowerBook 1400, intended to replace the 5300 as a general-purpose PowerBook; the PowerBook 2400, intended as a slim, sleek sub-notebook to replace the PowerBook Duo; and the luxury model PowerBook 3400. The PowerBook 1400 and 3400 were the first PowerBooks ever to include an internal CD drive. Late in 1997, the PowerBook 3400 was adapted into the first PowerBook G3, codenamed the Kanga. This series was the last PowerBook model to employ a "real" keyboard with 1 cm high keys; all later models have flat keys. PowerBook G3 The first PowerBook G3 Series (completely redesigned from the Kanga) was released in 1998, although it was still an Old World ROM Mac. These new PowerBooks took design cues from the 500 series PowerBook, sporting dramatic curves and a jet-black plastic case. They were so fashionable that various G3 models became the personal computer of Carrie Bradshaw in the long-running Sex and the City television show. Debuting at roughly the same time as the G3 iMac, the "WallStreet/Mainstreet" series composed of models with varying features, such as different processing speeds (from 233 to 300 MHz) and the choice of 12-, 13-, or 14-inch screens. They all included dual drive bays capable of accommodating floppy drives, CD-ROM/DVD-ROM drives, hard drives, or even extra batteries. A second PowerBook G3 Series code-named "PDQ" was introduced later in 1998, with minor changes in configuration options, notably the inclusion of L2 cache in even the lowest-priced 233 MHz model, which helped overall performance. Apple introduced two later G3 PowerBook models, similar in appearance (curved, black plastic case with black rubberized sections) but thinner, lighter and with revised internal systems. The "Lombard" appeared in 1999, (AKA: Bronze Keyboard) a thinner, lighter, and