Smaller and simpler than 3 SMD chips, and 10 passives?
Get rid of the LEDs and save 4 parts? Live dangerously and toss out the DW01 for another 6 part discount?
What could you mean than smaller and simpler? You could build the charger in the schematic, which is the ultimate, standard, paired down option, on a US quarter single-sided.
Or, you can spend less than one USD and buy a typical commercial version: