The best thing to purchase is a universal power adapter. These have a few different plugs and allow for the voltage to be set to many different settings. I've used one of these to power everything from CD players to Tiger 2XLs (haven't used it on a laptop only because I've never had a reason to, but I'm sure it would work fine given the correct settings). Be careful to set the correct voltage. MacTracker doesn't have the power specs for these (or any) clones, so you'll have to rely on the electronics themselves or search the web further.
Also, most Outbounds seemed to use discarded Plus or SE parts (at least the early ones did; I remember reading about them back in the day). Multi-colored power lights were actually used on a few laptops in the 1980s--I have an old Toshiba that has one. It turns green if the battery is fully-charged, red if the battery is not, and blinks red if there's a problem. (If the red and green indicators sound familiar, you probably have a MagSafe in front of you--the colors are nothing new). However, I am led to believe the red light indicates there is insufficient power coming into the computer based on the symbol used. Try a new battery (since you have the Maxell replacement, try looking for one online using its model number) and then look for the correct AC adapter or a universal plug like the one I talked about in the previous paragraph. If that doesn't work, perhaps there's a problem with the actual power supply.
Also, most Outbounds seemed to use discarded Plus or SE parts (at least the early ones did; I remember reading about them back in the day). Multi-colored power lights were actually used on a few laptops in the 1980s--I have an old Toshiba that has one. It turns green if the battery is fully-charged, red if the battery is not, and blinks red if there's a problem. (If the red and green indicators sound familiar, you probably have a MagSafe in front of you--the colors are nothing new). However, I am led to believe the red light indicates there is insufficient power coming into the computer based on the symbol used. Try a new battery (since you have the Maxell replacement, try looking for one online using its model number) and then look for the correct AC adapter or a universal plug like the one I talked about in the previous paragraph. If that doesn't work, perhaps there's a problem with the actual power supply.