When the "battery needs replacement" beep started I got on line and ordered a new replacement. Arrived in a reasonable time and had it replace and running minus the beeping in about 5 minutes. Easy to replace and a breeze to send to recyclers.
This is the third battery we have replaced in our APC over the last 10 years. Still working like a champ. It is easy to replace and really like how easy it is to recycle of the old battery. Thanks to APC for paying the shipping for the recylce. Not all retailers do that.
This is the second time I have replaced the batteries on the Smart b/u DLA-750. The previous batteries lasted a bit over 2 years. In South Florida weather, brown outs, power surges, lightning and all else they last very well and makes for a great unit with easy management. The hot swap of the batteries makes it even easier to care for. It's a quick face plate movement, quick click disconnect/reconnect and you're done. Easy return or local drop off to recycle the old batteries and you are done! Nothing, in my experience, has been more reliable, cost efficient and easy to use and maintain.