In the world of FPV drones, the choice of battery configurations significantly influences performance and capabilities. Over time, there's been a shift in standard battery voltages, with 3S and 4S dominating in 2015, followed by the prevalence of 6S in 2018. Presently, there's a rising trend favoring higher voltage options, notably 8S batteries. This article delves into the factors driving the increasing interest in 8S batteries.

Preparing for 8S Battery Adoption

An 8S FPV drone battery relies on the number of cells in a LiPo battery, impacting its voltage output. Acquiring an 8S LiPo Battery These batteries are available from various sources. However, it's crucial to note that most current LiPo chargers only support up to 6S, requiring the purchase of an 8S-compatible charger. Securing Suitable KV Motors Motors with appropriate KV ratings between 1200KV to 1500KV are essential for 8S drones. Alternatively, 6S brushless motor can operate with an 8S battery at a 75% output limit, akin to running 6S on 4S motors. Compatibility with 8S voltage necessitates an 8S-compatible FC/ESC setup. 8S-Compatible Flight Controller and ESC An essential aspect of the setup involves having an 8S-compatible Flight Controller (FC) and Electronic Speed Controller (ESC). However, finding FC/ESC stacks compatible with 8S is currently limited.

Introduction to Flight Control System: The flight control system, the drone's core, links all components except the brushless motor for drone, regulating their operations and precisely controlling the drone's flying attitude.

Overview of ESC: The Electronic Speed Controller (ESC) manages motor speed by converting DC power into usable three-phase AC power, acting as the intermediary between the motor and the flight control system.

Advantages of Higher Voltage

Utilizing higher voltages in FPV drones offers several benefits. Higher voltages facilitate similar power delivery at lower currents, reducing heat generation across the system. This decrease in current mitigates battery voltage depression, enhancing throttle control and response, akin to transitioning from 4S to 6S for 5-inch FPV drones.

Disadvantages of Higher Voltage

Higher voltage demands lower KV motors to achieve desired RPMs with increased battery counts. While higher voltages offer significant benefits, they also pose challenges. Motors with increased stator windings for lower KV might compromise cooling performance, albeit less pronouncedly with 8S compared to 6S.

Moreover, only a few FPV components, such as FC and VTX, are compatible with higher voltages, necessitating voltage regulators for these electronics. The limited extensive testing for 8S compatibility in most market components could elevate failure risks.

Conclusion: Not Recommended in 2023

Currently, 8S batteries are rare and notably pricier than 6S options. Their larger size increases drone weight, heightening the risks of crash-related damages. The limited compatibility of FPV components and potential durability concerns make 8S less feasible. Despite its potential performance advantages, concerns about readiness, cost, and compatibility outweigh its benefits. As technology advances, 8S may evolve to cater to individual needs and flight styles.