battery for Ipad 1st generation

The iPad 1st generation is an antique and you will not find many apps that will still run on it. You could make an appointment at the nearest Apple Store for Battery Replacement, but I would think the money spent on a new battery would be better spent on updating to a newer device.

Apple Store - Find a Store - Apple

Be aware that removal of the existing battery during the replacement process will result in loss of all stored data and installed Apps. While you should be able to restore your data from your iCloud or iTunes backup, you’ll not be able to reinstall any purchased Apps from the Apple App Store.

The majority, if not all, 32-bit Apps that are compatible with the older 32-bit models of iPad have been withdrawn from the App Store. Once removed from the App,Store, you’ll not be able to reinstall these Apps on your iPad1. As such, you may have no alternative other than to consider replacement of your original first generation iPad with a much newer model.

The current entry-level iPad, the iPad9, is considerably more powerful than your iPad1. Being a 64-bit device, capable of running running iPadOS 15.x, you’ll be able to install the vast majority of currently available Apps.

If you do not want to spend so much money.

Replacing battery on such an old iPad is really money wasted.

Better deal is to buy Apple refurbished iPad, it is as good as new and with warranty.

Read here => Refurbished iPad Deals - Apple

Just to our things in perspective, the first generation iPad was discontinued by Apple more than eleven years ago.

While the current iPadOS version is 15.4, the latest iOS version available for the original iPad is 5.1.1.