Deep Dive: T6A10
The correct answer is D: All these choices are correct. All of these battery chemistries are rechargeable: Nickel-metal hydride (NiMH), Lithium-ion (Li-ion), and Lead-acid. These are all common rechargeable battery types used in amateur radio equipment. Rechargeable batteries can be recharged many times, making them cost-effective and environmentally friendly. Nickel-metal hydride batteries are common in portable equipment. Lithium-ion batteries are used in modern devices for high energy density. Lead-acid batteries are used in larger applications like base stations and vehicles. All three types can be recharged by applying the correct charging voltage and current. Understanding battery types is important for selecting the right power source for your equipment.
Why Other Answers Are Wrong
Option A: Incorrect. While NiMH is rechargeable, the question asks which are rechargeable, and all three listed are rechargeable, so this is incomplete. Option B: Incorrect. While Li-ion is rechargeable, the question asks which are rechargeable, and all three listed are rechargeable, so this is incomplete. Option C: Incorrect. While Lead-acid is rechargeable, the question asks which are rechargeable, and all three listed are rechargeable, so this is incomplete.
Exam Tip
All three battery types = Rechargeable. Remember: NiMH, Li-ion, and Lead-acid are all rechargeable battery chemistries commonly used in amateur radio.
Memory Aid
**R**echargeable = **N**iMH, **L**i-ion, **L**ead-acid (think 'R = NLL')
Real-World Example
You're choosing batteries for your portable station. You consider NiMH for your handheld (rechargeable), Li-ion for your tablet (rechargeable), and Lead-acid for your base station backup (rechargeable). All three types can be recharged many times, making them economical choices for different applications.
Source & Coverage
Question Pool: 2022-2026 Question Pool
Subelement: T6A
Reference: 2022-2026 Question Pool · T6 - Electrical components
Key Concepts
Verified Content
Question from the official FCC Technician Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the T6A topic.