A:AnswerThe Lenovo IdeaPad 330-17 laptop comes with a limited 1-year manufacturer's warranty for OEM issues. The 2.5" 7mm SATA hard drive is not soldered. Model number 81DM001UUS does have an optical drive.
A:AnswerIf the battery will not hold a charge, you can have a certified maintenance person replace the battery or do so yourself if the warranty isn't important. Here is the mainenance manual if you want to do it yourself: https://download.lenovo.com/consumer/mobiles_pub/330-17ikb_81dk_330-17ikb_81dm_hmm_201803.pdf
Here are the battery part numbers (you can probably find after market batteries that work and are cheaper):
7.6V35Wh2cell 5B10M90490
7.6V35Wh2cell 5B10M91443
7.5V30Wh2cell 5B10M86148
7.6V30Wh2cell 5B10M88058
7.5V35Wh2cell 5B10M86149
7.6V35Wh2cell 5B10M88059
A:AnswerThere is one RAM memory slot within this configuration. This device ships with 4GB of RAM soldered to the motherboard and 4GB of RAM in the one RAM memory slot. Please keep in mind, this model is not user upgradable. A certified technician must do all of the work, so as to not void the warranty. Your certified technician can replace the 4GB stick of DDR4-2133MHz RAM with an 8GB stick of RAM, for a system RAM total of 12GB.